FF14 question regarding the game as a whole

[Enkidoh]

Technically, although the storyline is a continuation from the original version of FFXIV (version 1.0) - it is also regarded as a reboot, as the original version has been shut down and will never be playable again.

Therefore, ARR effectively replaces 1.0 as the true FFXIV, even though the storyline is much updated to compensate for the changed world circumstances (the connecting element was the fall of Hydaelyn's second moon Dalamud, and the release of Bahamut who had been contained within. This event, known in-universe as the 'Calamity', was used to shut down the original version of the game last year, and act as the stepping stone to ARR - as Dalamud's destruction and Bahamut's rampage laid waste to much of the game world, this event completely changed Eorzea's surface and providing an in-universe reason for why the maps in ARR are much different to those in 1.0).

Really, you don't need to have played version 1.0 to enjoy ARR, as all the important information that connects the storyline back to 1.0 is revealed during ARR's storyline.