You can skip whole story and just go to TL;DR if you are just interested into “MONO_DEBUG=disable-omit-fp”.

I have been working on Xamarin Studio(MonoDevelop) for more than 2 years now. During this time, we made migration to Roslyn and UI is now much nicer looking. Debugging, writing code… Has less and less bugs every day. There are few more areas that needs some UX love like unit testing story, version control integration… But overall IDE is very nice to work with, except when you get beachball spinning, waiting for file switch, laggy/jerky code typing… you get the idea.