Well, just now, the .NET 6 LTS has been released.. and its going to be supported for the next 3 years (hence the LTS).
While the .NET 5 is not LTS and will not be getting any patches soon.
So I'll probably be upgrading net5 branch to net6, but a pull request will have to be made to the net5 branch in the main repository and then renamed to net6. Does that sound good?
P.S. the net 4.5 InSim.NET was upgraded to support 0.6W (insim 9). It just wasn't posted to NuGet so you (InSim.NET users) have to clone/download the source and build it yourself
it shouldn't be very hard, post here if you're having any difficulties with that.