I recently had to quickly add a front end feature that really should have been a separate web app to my main project at work (Vue SPA) to get ahead of some external audit.

Another team hastily built the back end + rest api. There's no filtering / pagination / anything nice in the api, so we just get back 1000s of records and do it all on the front end.

Found out prod deployment that it's used exclusively by contractors in India on very low power VDIs. So extremely bad performance. Doing it literally any other way would have probably been better, but something like LiveView would have been great for the interactivity. Although I don't want to go back to a world without static types.