Patch 9.1.5 - Old Starter Gear Availability
Patch 9.1.5 introduces new Starting Gear Armor Sets, replacing the old starter gear from Vanilla zones. If you're interested in collecting the items before the patch goes live on November 2, Simaia has created a spreadsheet that covers all common gear from different classes and races.
If you don't wanna bother making alts and storing all that common gear in the bank, there are some good news though. Blizzard has announced that they're working on making the old starter gear available in the future.
Patch 9.1 Hotfixes - October 22, 2021