How feasible would it be for laptop manufacturers to add a slot in a laptop's underside cover to the CPU's heat pipe, and adjust the heat pipe's shape at this location? This would allow a dock to insert its own heat pipe through it, and dissipate the heat with larger fans and/or larger heat sink.
It would risk the user touching the heatpipe during work, which is quite toasty under heavy load.
Not quite the same, but there are laptops with external water cooling that connect to internal piping inside the laptop when placed on the dock:
https://videocardz.com/newz/colorful-launches-water-cooled-l...
For Macbook Air there was DIY solutions where people added thermal pads to conduct the heat to the aluminium chassis and then use external cooling on that [1]. Since Air just has passive cooling, this gave major boost for long running tasks.
[1] https://forums.macrumors.com/threads/guide-macbook-air-heats...