A notable mention is https://ubports.com/en/ which is different from postmarketos in a sense that ubports uses old kernels with heavy patches. That means: good support for things, but difficult future.
PostmarketOS uses the newest kernels and tries to integrate their patches into mainline kernel, so that the reliability is maintained with all kernel developers.
Maybe whenever slider phones with full keyboards come back. Typing in the terminal would be a real chore otherwise.
You do get used to it to some degree, but yes please bring the keyboards back