Looks interesting. As someone who's been using Pascal since Turbo Pascal 6, and use Delphi daily at work, I'm not sure I quite get the "COM-style interface GUID" objection. What exactly about it is complex, and how do you implement Supports() without it?
It is a bit curious with the Mojo 1.0 beta coincidence, as Pascal was the other langauge with a highly readable and quite simple language combined with performant compiled code without GC.
What it lacked was a modern compiler and stack. There is FreePascal for sure, and Lazarus is impressive, but it for sure has its baggage.