[endemic]

> you still have to do that somewhere with complexity

Don’t forget about the other “invisible” requirements with a JS solution — more tests, more code, longer builds, more 3rd party libraries.

[synergy20]

or you have to test Model View and Controller at the backend, the backend can be messy as well over time, not to mention it has to sync with frontend team. it depends on team experience, e.g. stronger at backend or frontend and more importantly, how they work together.