I write little bits of code then test them. If the screen flickers i wouldnt continue until it is solved. If ive missed it and have to hear it from (a) user(s) i would kinda like to fix it imediately. Not always possible but truly annoying things have priority over new things.

If i had unlimited developers at my command. All many times as fast as me.... how can i keep the problem? It would take some huge effort to keep.

The unlimited number of devs would talk about it an unlimited number of times. Not fixing it would be very expensive that way.