Interesting thank you for doing your testing. Maybe it just feels bad due to all of the packages with a template URP project is quite considerable. Going from 10 to 5 seconds for code changes are pretty great improvement in 2023.1, congrats there! I will say 10 seconds doesn’t feel bad after you have to deal with the code iteration in Unreal. 
I’ll guess Unity can’t say when domain reload will be fixed because it seems everyone is in a holding pattern waiting on the .NET CLR update. ( Unity Future .NET Development Status ) I feel the entire future of Unity is dependent on when/how they execute that change, no pressure.