It's one thing to want your devs to produce readable code -- as a former CTO I also spent significant effort in teaching people that -- but it's completely anot

It's one thing to want your devs to produce readable code -- as a former CTO I also spent significant effort in teaching people that -- but it's completely another to be a curmudgeon and directly disregard valuable programming tools like the sum types. Not sure why you are conflating both. Also inheritance was known to be the wrong tool for the job at least 15 years ago, maybe even 20. Back then people wrote Java books that said "prefer composition over inheritance" so your analogy didn't really land. Everyone who uses sum types in production code agrees they reduce bugs. Maybe it's time for you to retire.