There is also a physical challenge to keeping cool - dust. It accumulates inside your laptop over time, weakening the efficiency of the fans, particularly if you tour / travel a lot and play live everywhere from summer outdoor festivals with thousands of people trampling up dried mud to dirty basement clubs, but I’m assuming also just sitting in a studio or office will ingest enough over time to eventually create a problem. The dust particles accumulates in larger clusters over time, which then blocks the vents and clogs the fans so they can’t spin fast enough, can’t move enough air through the system to keep it as cool as the computer expects it too. Then kernel_task kicks in.
I had huge problems with kernel_task and overheating, building towers of cooling pads and filling up USB hubs with external fans, it helped until it didn’t, it was like the computer was getting worse and worse, and then I opened my Macbook Pro and HOLY SHIT discovered the fans where CRAMMED with dust. Really, look at this! Insane! The fans are completely filled with dust!
Of course the computer couldn’t cool itself down. Cleaning the fans (with compressed air) solved it, instant improvement, no more kernel_task, my problem now is GPU limits, not system temps Now periodically checking and cleaning the fans is part of my regular system maintenance and backup routines. It could be that some laptop designs handles this dust accumulation better than others, so perhaps other systems won’t have this problem, but my MBPR late 2016 needs regular cleaning.