I have both a PinePhone Braveheart and a Purism Librem 5. While it is very exciting to see how far both have come within the past few months, my one gripe with both of them is none of them have the complete feature set of a phone, i.e. none support MMS. This means group texts and picture messages are not supported. While I am willing to tolerate a lot to be able to use open source technology, the inability to use it as a basic phone makes it a complete non-starter as a replacement.

It makes it even more difficult as so many of the OS and vendors advertise SMS and voice call support (which they have), so I have had to play the guessing game on a lot of the OSes that advertise SMS as working to discover this.

That being said, it is really exciting to see how far both have come, and I do think they both will be an awesome replacement to an Android phone sooner than later. Even more exciting is that they both are close to and will have mainline (EDIT: Mainline Linux) support, so they will be supported for a long time and not depend on a vendors willingness to support it.