Are you aware that AS laptops have become as performant as Intel desktops at the same power consumption? This peak performance bundled with 4 efficiency cores makes it far less likely that you will ever push the machine to the temperatures measured by testers after running Cinebench back to back for 30 minutes. As a user you experience much longer battery life, which means doing the same tasks the M1 will turn way less electricity into heat. Every percentage of battery life left is heat not yet produced.You are aware that AS devices run at similar temps to many x86 based laptops?
On the other hand AS desktops have become as power efficient as Intel laptops, which means they can now be cooled by tiny little laptop fans. iMacs used to double as electric heaters in the winter, but not anymore. In the past you could fry an egg or grill a steak on an x86 cpu. This won't work on an M1 iMac sipping 15W. The 24" iMac is just a little bit faster than an 8-core i9 iMac, but it is so much thinner, cooler and quieter.