I haven't dug into them deeper but Fossify have what seems to be decent basic options for all of the base Android apps: Phone, SMS, keyboard, camera, etc.
Just replacing all the stock apps with the Fossify suite looks like it could be an easy privacy win for someone stuck on a device with locked bootloader and dodgy stock apps from vendor or Google.
And thank you for the refining exchange!
I also recognize that both the rave scene and free software are enabled to a large extent by people with cushy high-paying jobs and rich kids who don't mind sinking some money (and sometimes employer goodwill) into their passion without expecting any returns.