How safe are Testing / Unstable branches in practice, can branches be switched on demand?

[anon89812132]

I use both testing and unstable on two main installs and regarding KDE Plasma this is the only thing i encountered as an issue in 2 years or so:

Plasma 5.25.3 - dual screen, Nvidia GPU, funky behavior

While the update itself went fine, can’t stay aside and not mention that since the advent of plasma 5.25 every time i use VirtualBox or Blender while i have a browser opened in another Activity, and then i try to edit something in Inkscape or Gimp (for example) in Work Activity, or i open any GTK+ app, all the context menus and the file dialog of all those opened apps (Qt or GTK+) are behind their main window. I can see them via the Overview, Present Windows or Desktop Grid, but i can’t get them…

Other than that there is nothing to break any workflow, just minor functionality differences.