For me it’s Whatsapp. Like 99% of people i know use it so yeh… i still need it. I am considering moving the Whatsapp Gdrive backup to a local backup btw.
Google photos is also a major problem for us. We have a lot of stuff that want to migrate to different service (or store locally).
Shout out to Freetube as an ad-free YT front-end replacement
Desktop: https://freetubeapp.io/#download
Android: https://apt.izzysoft.de/fdroid/index/apk/io.freetubeapp.freetube