Post Sundering Tech Level

[Lyth]

I doubt that 'technology' in the conventional sense would have existed to begin with in a society of gods. Necessity is the mother of invention, and if you ever actually wanted for anything, you'd simply will it into existence using Creation magic. That's likely also why the Garleans are the most technologically advanced people that we know of, simply because they had to supplement a relative inability to use magic with actual technological know-how in order to survive.

[Enkidoh]

I doubt that 'technology' in the conventional sense would have existed to begin with in a society of gods. Necessity is the mother of invention, and if you ever actually wanted for anything, you'd simply will it into existence using Creation magic. That's likely also why the Garleans are the most technologically advanced people that we know of, simply because they had to supplement a relative inability to use magic with actual technological know-how in order to survive.

Actually, the Ancients did seem to have quite a bit of technology in use, showing that not everything was simply conjured into being with Creation magic - aetherytes for instance was an Ancient pre-Sundering invention, and there also seemed to be some kind of computational devices in use (the Watcher's Palace on the Moon for instance has something called 'The Pillar of Industry' that is essentially for all intents and purposes a vending machine, the same place also has mechanical clocks in use (they have pendulems and timing regulation weights so they clearly have mechanical movements inside).

To say nothing of the loporrits using what are clearly computers with 3D holographic displays (and to writ, they also could use Creation Magic), and that the Moon itself has an engine, (remember, the Moon was also created by an Ancient (Venat). And the Ancients' lighting is actually electric (a broken light fitting shown in the Akademia Aynder for instance is shown sparking and flickering exactly like a broken electric light), so their knowledge was clearly highly advanced and not merely a reflection of their powers over Creation magic. Creation magic (and magic in general) went hand in hand with technology, the later does fit in with the 'Roaring 20's/Art-Deco' feel Amaurot had.

[Gemina]

Actually, the Ancients did seem to have quite a bit of technology in use, showing that not everything was simply conjured into being with Creation magic - aetherytes for instance was an Ancient pre-Sundering invention, and there also seemed to be some kind of computational devices in use (the Watcher's Palace on the Moon for instance has something called 'The Pillar of Industry' that is essentially for all intents and purposes a vending machine, the same place also has mechanical clocks in use (they have pendulems and timing regulation weights so they clearly have mechanical movements inside).

To say nothing of the loporrits using what are clearly computers with 3D holographic displays (and to writ, they also could use Creation Magic), and that the Moon itself has an engine, (remember, the Moon was also created by an Ancient (Venat). And the Ancients' lighting is actually electric (a broken light fitting shown in the Akademia Aynder for instance is shown sparking and flickering exactly like a broken electric light), so their knowledge was clearly highly advanced and not merely a reflection of their powers over Creation magic. Creation magic (and magic in general) went hand in hand with technology, the later does fit in with the 'Roaring 20's/Art-Deco' feel Amaurot had.

The only thing I will interject here is the Loporrits have had thousands of years to advance their technology, and even attest to this themselves. I don't know how much Venat actually had a role in the moon's construction opposed to just ordering the Loporrits to build it.

That is very minor though and our time in Elpis definitely shows the Ancient's technological knowledge is far beyond primitive. I would also say that the Loporitt's affinity for technology is more learned than inherited, and someone had to show them.

For OP, the rate at which time flows isn't much different on the first than it is on the source. What's different is the passage of time on the source and its reflections. What I mean by this is if you travel the dimensional rift from the source to the first, you will age on the first as you would normally on the source. However, you could spend months and even years on the first, return to the source, and find that only days or even hours have passed by.

This is actually one of my issues with this kind of travel within FFXIV. There is no point to add these kind of caveats to travel if they cannot remain consistent. We can now travel to and fro the source and first without consequence other than what the Scions initially feel upon our arrival to the Crystarium.