I think there's a huge opportunity if PG Music were to leverage the IP they have, with all their RealStyles and arranger knowledge, and create a modern app for iPadOS that could then be added to and deployed on Macs using things like Apple's Catalyst. There is a thriving music scene on iOS, with some very professional apps like Cubasis 3 available.
The iPad app wouldn't need to try to cover every use case, as the current app does, instead it could provide an entry level platform. Many users don't need all the features of the current app, and don't really deserve the dreadfully dated interface...