App availability is good for my needs. For Android apps I only use Whatsapp and Firefox (as backup browser). I am not someone wanting to use apps for everything, I never used a banking app for example, and have no desire to use one. I am quite happy with Whisperfish as a third-party Signal client that is now in beta, though it needs a few more things to be more useful to me. I use an OSM app for maps, mpd client for remote music, and some default Jolla apps are quite okay.
System stability overall is really good, I hardly ever get into a situation that a reboot is required. Some years ago on my Jolla 1 this did happen more, often when the network would not come back. There are some issues, like power drain on 4G and other small bits. The development team is small, it's not a billion dollar company, I think it's all relative.
I have never used Ubuntu Touch and I cannot really comment on it. If you would be interested in trying that again, I think Axolotl is a Signal client for UT that is also in development. For Android apps, there is Anbox, but that is a very slow moving target with some rather big issues currently, from what I hear.
System stability overall is really good, I hardly ever get into a situation that a reboot is required. Some years ago on my Jolla 1 this did happen more, often when the network would not come back. There are some issues, like power drain on 4G and other small bits. The development team is small, it's not a billion dollar company, I think it's all relative.
I have never used Ubuntu Touch and I cannot really comment on it. If you would be interested in trying that again, I think Axolotl is a Signal client for UT that is also in development. For Android apps, there is Anbox, but that is a very slow moving target with some rather big issues currently, from what I hear.