I've been playing with my pinephone a bit (2GB postmarketOS). Overall I think it's awesome and I love having a real linux machine in such a nice package. The build quality is much better than expected.

That said, Firefox is extremely slow and crashes a lot. Getting a fast stable browser seems like priority #1 to me. If these things are ever going to take off they need apps, and I think web apps (for better or for worse) are the quickest way to get a decent number of apps.

I'm not sure if it's simply a hardware issue (can't expect too much for 150USD), or a software optimization problem. I don't have a cheap Android phone to compare to.