I'm not an app expert nor an expert on GNOME development either, but I got a bit sceptical when I read their app example code, python with GNOME, neither is famous for being snappy.
That sort of thing seems like a good idea. There are X programs (and presumably Wayland programs) that do similar things (like web browsers stopping things when switching to a different tab or minimising the window). But we could probably do better with different interfaces.
For the moment the Librem 5 seems to be using apps designed to work on PC desktops but at lower resolutions.
For the moment the Librem 5 seems to be using apps designed to work on PC desktops but at lower resolutions.