The thing that makes me feel like I don't have enough space is crafting mats. Brand new recipes added in the latest expansion can take mats from ARR. So I end up keeping a lot of "old" mats in storage just because they still get used rarely.

The reason WoW could get away with less inventory space and it didn't feel cramped was because recipes always used mats from the expansion they came from (plus you only had 1 crafting job to even worry about).

I don't think the way FF14 does it is bad or wrong (I actually like it because content always stays relevant), but it does lead to feeling like you need more storage so that you don't have to waste time down the road dropping what you're doing to go gather an old mat that you threw out because you didn't think you would ever need it again.