.. how well does this work in a team? There are a number of people who do individual heroics in assembly, but I'm not aware of any large long term maintained such projects that have outlived their originator.
Maintenance involved fixing bugs (including in the OS kernel), localizing software to a different language (sounds inoffensive ... when you have source code. Much more nasty when translated sentence doesn't fit into its allocated place in the binary). And adapting to hardware difference, such as less RAM, less capable peripherals and slower CPUs.
EDIT: Minsk 32 was bespoke development but the language still was close enough to hardware to be qualified as assembly by today's standards.
I was fascinated by DRAKON when I first learned about it. The Wikipedia article said that it was used by other professions as well. For example doctors had flowcharts in DRACON for medical procedures etc.
I'll be glad (and think that the whole community will be glad) if you decide you want to share more historical anectodes about the Soviet computer program.