I just learned today that another new GC for SBCL is in the works, with GC pauses under 100 microseconds.
Python doesn't have a standard, but it has a canonical implementation, so maybe a "defacto standard". Not having an official standard didn't matter, though.
Common Lisp has defacto "standard libraries" for things like threading. Other things, such as async, are less clear (to me), but libraries do exist. Just because something isn't in the standard, though, doesn't mean it can't exist. Also, implementation such as SBCL pick up a lot of the slack, filling in some of the missing gaps.
So much stuff has changed since 2013. Containerization, massive increase in concurrency, mobile platform explosion, etc. Where is the concurrency standard ? Are these 14 CDR's even implemented by CL implementations ? Can't find which CL implementation implements priority queue. Several of those CDR's don't even appear active.