It is loathable and contemptible behavior. I despise it. Writing in fancy code editors is an exercise in "remember this display was very expensive calm down".

> type out 'i' and 'f'

RED ALERT! RED ALERT! UHHHHH HEY THERE CHAMP YOUR IF-THEN STATEMENT ISN'T CLOSED OUT PROPERLY!

Yeah, I know, I'm not done fucking typing yet. Give me a second.

Thankfully I can usually turn this crap to only show these after a certain delay, for many languages I write in I usually turn it off completely except for on build/run. Let the complier/shell throw me errors, the LSP can take a chill pill.