> A simple dropdown with a finite list? Has its own loader and makes 10 fetch requests for no reason. Not even exaggerating - look at Instagram and Facebook on web.

I’ve seen an address form with search dropdowns that were absolutely bonkers. First it loads the list of countries. You start typing and the list disappears – it sends the text to backend, which returns... exactly the same list. The filtering is then done on the frontend. (After you select the country, you can select the region and then the city, which, of course, work exactly the same.)