I think the Japanese software market is going to crash around 2023 - 2025. There is no PS5 software in sight and the Nintendo Switch is on the decline in software sales. 30th place on the charts will probably soon be <1000 units which has not been seen since the early 90s. I don’t think there will be any sort of issue like that in other markets though as Nintendo is not declining as much or even up year in those markets. And also, PlayStation and Xbox have a decent market share in other regions.
Tbf Famitsu does not include digital sales so obviously digital is eating some sales. Plus, digital sales percentage are only increasing every year. With subscription services also starting to thrive, obviously software sales are going to decrease.