[vacuity]

Probably a lot of overlap with the links upthread, but [0] also goes over Unix and Smalltalk (and I only just realized is also by Stephen Kell).

[0] https://dl.acm.org/doi/10.1145/2525528.2525534

[sph]

This quote from Dan Ingalls is also relevant:

"An operating system is a collection of things that don’t fit into a language. There shouldn’t be one."