There is much to like about Musescore 4.
The following three changes would increase convenience:
1. The ability to change the number of measures per each system would allow adjusting pagination to facilitate page turns.
2. The automatic cursor location jump at the end of a system or page is an aggravation when one is not finished writing the previous measure.
3. When writing triplets to the quarter note, for example, the triplet selector changes the note denomination to eighths. This selection process is required for each beat. That means: select the quarter note, select triplet, confirm, write triplet beat, then repeat the whole process in order to write the next beat. I would suggest that once triplet is selected it should remain in process until cancelled.