Garbage collection seems like a significant no-go for many safety critical systems. Other oddities like 31 and 63 bit numbers probably aren't a big deal but are

Garbage collection seems like a significant no-go for many safety critical systems. Other oddities like 31 and 63 bit numbers probably aren't a big deal but are still weird. "Mature" seems like a stretch when OCaml only got proper multi threading 1.5 years ago.