DivestOS is not the best OS, for modern devices I recommend GrapheneOS.

Only if you have a Google Pixel for GrapheneOS. That's a really small subset of "modern devices".

And only if you don't care about SafetyNet.

The situation has got so bad that regulators should probably get involved.

Important software people depend on such as banking or electronic payment apps can't be used with relatively safe and maintained operating systems, forcing the use of unmaintained, insecure stock system just to get SafetyNet these apps wrongly require.