MuseScore 4 already shines as a notation program. However, Sibelius Ultimate is still widely used by composers, arrangers, and musicians alike. However, just like with Finale v27, MuseScore will shine in the end.
0:00 - Intro
0:26 - Why will MuseScore overtake Sibelius?
2:10 - Why not sooner?
Why you should use MuseScore: https://www.youtube.com/watch?v=mhMr8-yCTAo
Finale/Sibelius/MuseScore/Dorico comparison: https://www.youtube.com/watch?v=FaG5ofnIE2c
Finale will die by 2030: https://www.youtube.com/watch?v=kRi-MBU5bNo