MacOS Sequoia filling up with system data

I had the humongous System Data issue about a week ago (90MB of free space?!) and solved by 2 actions:

First deleting the offending cache* at ~/Library/Containers/com.apple.mediaanalysisd/Data/Library/Caches.

Next I upgraded to Sequoia 15.2, where apparently this cache over-filling is solved.

No problems now.

*in ~/Library/Containers/com.apple.mediaanalysisd one of the directories was humongous and filled 99.9% of free space. Go and check that directory in your ~/Library and by size it's immediately clear. Delete the oversize directory, and upgrade to MacOS 15.2 directly after that.

I could not upgrade to 15.2 prior to clearing this cache because, no free space...

I noticed this issue some weeks after upgrading to Sequoia, it probably appeared in Sequoia 15.1.

(the system had been creating a new mediaanalysisd cache file of 64MB probably every hour or so, without ever deleting the older ones. I saw an endless list of these 64MB files... On its own that sounds a small file, but in the end filled some hundreds of GB in that cache)