We hear almost nothing but complaints about them from long-time Mac users who are used to historically quieter devices. Under any load, like a few minutes of Zoom or Teams while connected to an external display, the fans are persistently and disconcertingly audible. It's become almost a meme in video conferences over the past two years when someone unmutes to speak and the fan noise overwhelms the noise suppression that you know they have a Mac.
Display artifacts and connection issues to USB-C displays aren't uncommon on the 2017-2019s either, but it still sounds like a torture test when running two 4k TB3 displays or a single 5k on one. The M1s are the first Macs I've recommend to friends and family in almost a decade.
(I use one for work, it is terrible. And I used to have one for personal use, which I traded for a M1 Air)