I keep my eye on Linux phones from time-to-time.

By "linux" -- I guess I mean using a phone that runs a valid linux distribution that gives me freedom of control as well as software freedom.

I know people have a love/hate with environments like GNOME, but I don't mind it and happy for it on my phone.. as long as it adapts nicely on smaller screens.

My only issue is applications. Like many, I am using an Android/IPhone - and have installed various applications. Will any/most of these exist if/when I move over to a proper GNU/Linux phone?

This is the biggest hurdle. While I would find ways around it, I think this is where most people would stick to what they are familiar with... even if it is impacting rights, legalities, and other things we are slowly losing control over, etc.

I really do like the idea of Librem 5.

I run Andoid apps on my Librem 5 using Waydroid.