He's talking about 6~(?) months ago, they ditched the android specific codebase and ported the iPhone app to Android ("unified the codebase") which made a lot of things shittier on the android side of things
Yup, still mad about that one.
Some day nobody will remember that the mobile app was somewhat responsive.
I do know that there are projects that still allow you to use the old app; but I don't know how long the API for it will still be supported by discord.