From my experience slow laptops are slow not because of the cpu (I mean, we’re not running a chess engine here…) but slow disks and slow/not enough RAM, which compounds the disk issue as soon as you start actively swapping… which in some of these is about as soon as the OS boots.
Like, I just loaded up the Best Buy app and 3 of their top 10 selling laptops only have 4GB of RAM. I haven’t used a computer with that little RAM in over a decade.