Comment by ClumsyPilot

I have at various points replaced or upgraded 15 NVME SSD's in desktops and laptops, and I have not seen a single one - could you please let me know where I can find a non-server SSD with capacitors that are large enough for it to flush data in case of a sudden power loss?

Laptop batteries are irrelevant - battery failure, freezin or cutting power to the curcuitbord by holding the off buttons are the failrue modes you have to protect against.