Right now, although it's possible to use Android with either root or a third party ROM, attestation breaks all sorts of little things. Today this is mostly banking apps, and anything that involves NFC, but this isn't where it's going to end.
Attestation requirements are only going to become more prevalent. I predict that in a few years basically all proprietary software for Android will require attestation.
So... you may still be able to unlock the device and make it yours, but you'll also be locked out of the ever expanding and ever-more-isolated walled garden.
If you can live off of GrapheneOS and F-Droid, that's great, but for a lot of users this won't be a real choice, because you increasingly need proprietary software for access to real things in the physical world (i.e. I needed to install a special app for event tickets recently).
Attestation requirements are only going to become more prevalent. I predict that in a few years basically all proprietary software for Android will require attestation.
So... you may still be able to unlock the device and make it yours, but you'll also be locked out of the ever expanding and ever-more-isolated walled garden.
If you can live off of GrapheneOS and F-Droid, that's great, but for a lot of users this won't be a real choice, because you increasingly need proprietary software for access to real things in the physical world (i.e. I needed to install a special app for event tickets recently).