Kirk McElhearn, writing for Kirkville, reports that users are passing the old 25,000 track limit. He adds:

With iTunes Match and iCloud Music Library, all tracks in your library are counted against the limit with the exception of iTunes Store purchases. So any tracks you add to your library that you’ve ripped from CDs, or that you add from Apple Music, count against the limit.

Eddy Cue said, earlier this year, that Apple would increase the track limit to 100,000. If anyone has tried to put that many tracks in the cloud, please post in the comments. And anyone else who has more than 25,000 tracks, post the number of tracks that you’ve matched or uploaded.

MacRumors verifies the new 100,000 limit in this post:

Eddy Cue has confirmed to MacRumors that Apple has indeed “started rolling out support for 100k libraries.”