We currently have 29 jobs (counting combat, crafting, and gathering all together), each needing a main hand item, in a 35-slot bag. Even if you only carry one item per job, that's pretty tight. If you're carrying extra, whether for glamour, spares for later levels in jobs you're still working on, or whatever other reason, it's not enough.

Rings are almost as bad. We have seven different roles (tank, healer, strength DPS, dexterity DPS, caster, crafter, gather), each needing two rings. Plus blue mage, being locked at 50, takes another pair. And, again, if they're at different levels, that takes up more slots, since they're not sharing if they're not close.

Left-side slots are tight right now, with people just hitting 80 on multiple jobs and still carrying relic gear, which also isn't shared between jobs, but that'll even out as gear progresses.