I'm really intrigued to try it myself. Dismembering the Google ecosystem sounds so good, but I don't know where to start!
I am a heavy daily user of Calendar, Tasks, Photos and Gmail... How do you start disconnecting and porting yourself from Google?
I'm an advocate for fixing if you can, the phone still feels as snappy as it used to and I really like it's size and weight.
A new battery is as cheap as 7$ on AliExpress.
Actually I am not sure what determines EOL for custom ROMs... Maybe it has to do with the firmware not being updated by Google? Although I read somewhere it has something to do with the kernel version - which I'm not sure why you can't update?
Maybe someone with more knowledge on the topic can enlighten me.