This has been in the works since April: https://github.com/mono/mono/issues/21796
I'm not explicitly mentioned in the post, but effectively the maintainer duties for the Mono project now fall on me. It sort of worked out that Wine Mono (which I maintain) became the primary user of Mono that hadn't moved to modern .NET, with the other common use case being winforms on Linux. I might be the only person left who cares enough and has the generalist knowledge to muddle through.
@madewokherd pour one out for one of the greats