There main counterargument from the basic systems engineering pov is that having logic in the frontend bumps the system to another tier of complexity and hairin

There main counterargument from the basic systems engineering pov is that having logic in the frontend bumps the system to another tier of complexity and hairiness as a distributed system running over a unreliable network. The language preference thing is there too but mitigated by lots of nicer languages that can target JS since 10+ years ago, like ClojureScript, Elm, TypeScript etc.