I’m on a project I created in .NET 1 and then migrated to 2.0 (to generics) early on. It’s moved through VSS via svn to git. It has gone from VS 2002 on CD’s to VS2019/2022. It has over 100k commits. Still work full time on it today. I share your experience with the migrations. Never an issue. The new sdk (“core”) style project system was probably the largest blessing of this whole journey.