Originally Posted by
Iscah
As others said, they still exist, they're just a lot harder to track down if you don't know where to look for them.
The upgrade shops in ARR and HW are fairly out in the open and obvious, but SB's is inside Eureka (so you'll never see it if you don't start that content) and ShB isn't an upgrade at all, but acquired from variable coffers that give you gear for your current job - so even if you find the shop (back in Mor Dhona with the tome gear vendors) you won't see any of the actual gear and can't try it on, or even recognise it as upgraded weathered gear.