I've been organizing my dependencies for @xunit v3 so I can minimize them (anything that doesn't ship in .NET itself is a potential compatibility clash with library versions that developers want to use).
I'm not that worried about System.Collections.Immutable or IAsyncDisposable having breaking changes across major versions. System.Text.Json, on the other hand, feels like potential danger territory. The alternative of writing even a very feature-limited JSON parser makes me uncomfortable.
