Need for more item storage

[Jojoya]

Seconding this. The big issue between people who want more space and people who think it's not needed I think is how much glamour gear you keep around.
I've been collection glamour gear for years now, from raid gear to relics to artifact gear to particularly nice dungeon gear like Bonewicca and Shadowless, to just hard to get crafted glam and everything the Gold Saucer has to offer.
I have six retainers completely full on glamour, stuffed to the brim, and a seventh well on the way. My Glamour Dresser has around 3 slots left. My saddlebags are full. If we don't get more space I will soon have to go through all of it and determine everything that can be re-acquired with relative ease because I am just running out of room.
If we had some kind of Glamour Catalogue like WoW this problem would go away, and I doubt anyone would need more space. I know it's a lot of work, but this problem will never be solved until the work is put in to create an actual solution.

While a WoW Transmog collection style system would be nice, I doubt we'll ever get it.

There's little point in keeping glamour items you're unlikely to ever use. Most of it is not just "relatively" easy to farm, it is plain easy to farm as our job levels increase so we can quickly solo farm instances unsynced or as we can gather the needed to materials to craft quickly. If it's been sitting on your retainer for a year unused, accept you're probably never going to use it and convert it to gil by turning in for GC seals to buy mats/ventures or desynthesizing for materials to sell.

An inventory clogged up with things we aren't using is gil lost.