I'm only comfortable doing that after I've got at least 3 years of value out of it. My current laptop is an aging Zenbook Pro where I've replaced the custom SSD

I'm only comfortable doing that after I've got at least 3 years of value out of it. My current laptop is an aging Zenbook Pro where I've replaced the custom SSD with an adapter plus an m.2 board. So maybe if you still want to use the laptop after a few years you can open it up and give it a bit of a facelift. Maybe applying a whole bunch of thermal paste will give it a slightly new lease of life?