It has been very hard getting improvements to the interface as there are many long time users that don't like change.
Even if that were true, which I dispute, what would it matter? Can’t PG Music continue to improve as it sees fit?
Do you have evidence for your statement? For example, a poll on whether the long-time users like or do not like the GUI changes of 2018? I know I switched almost immediately to the new one. I also know several of the longest users have continued to advocate for changes, including in ways that the general public would not see. I don’t understand why anyone would try to divide the user base.