The Phison e26 is built on 12nm, surely a shrink to 7 or 5 nm would reduced power consumption to tolerable levels?
It would, but following the trend so far, they'd instead use it on Gen 6 which would more than offset any gains and would require even more cooling.
The latest Gen 3 Samsung Evo Plus has exactly the same thermal problems as my four year old version. There was no die-shrink that made it better. I also can't think of a single Gen 4 drive that was later re-released without a heatsink, and the bare drive no longer throttled.
The problem has been masked by more motherboards coming with heatsinks, so most people automatically use them and not bare drives. Also barely any SSD reviews test thermal throttling.
I didn't even know it was happening to me until I checked the temperature. Previously I assumed the dropping file copy speeds were just the SLC cache being exhausted.
Gen 5 has reached the tipping point where it needs active cooling not to throttle, so we can see rising thermals have been a problem all along.
It would be useful for BIOSes to allow controlling M.2 lanes just like PEG. I'd be happy to drop to 2x or 1x so I could run a bare drive without throttling. Sadly my MOBO only has a SATA / NVMe toggle.