Back in 2020, it was important to provide logged-in users an easy way to go back to legacy Vector (T243281). It's time to revisit that functionality.
User Story
As a logged-in user, I want an easy way to easily switch back and forth between legacy and 2022.
Brought up in this conversation at Village Pump (proposals) on English Wikipedia: https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(proposals)#Easy_switching_skins