So for every weird, cool innovation you see, the productivity is immediately lost because people equally care about how you deal with state on app startup, or routing, or database interaction. And since none of those other things move the needle much in how you compete in your business domain, competitors who are not concerned wind up eclipsing you. While you're arguing integrant vs. mount, people are just running dotnet new and bikeshedding over things closer to the business domain.
PMs/EMs/QAs/etc. may not have technical knowledge, but they smell something off about programmers arguing about what library to use for routing. Why didn't people complain about this at their past jobs? Surely if it was important, it would have come up. They just perceive you as having hired a bunch of senior people who are incredibly slow relative to their past companies. It really breeds resentment.
I have seen clojure-first companies creatively hive off parts of their engineering org to have a separate org that is allowed to use a different stack. They're not super transparent about it to avoid a big exodus of people, but I've personally seen it happen more than once.
