I don’t find MuseScore4 anywhere as user friendly as 3. It is also very slow. As a consequence I rarely use it, but am forced to when I download a tune – by default it now goes to 4. I also find it frustrating that i cannot cut and paste from one version (4) to the other (3). finally, when I copy a part from a score and paste it into a separate page, it often/usually comes out in a different key so that I have to transpose it.