Needing to copy code around is largely a JS thing IMO. Java has such good standard and third party library support that I don't see what would be that reusable

Needing to copy code around is largely a JS thing IMO. Java has such good standard and third party library support that I don't see what would be that reusable between the front and backend. Except maybe validators, gRPC doesnt support even basic field validation its annoying.