Graphics drivers are a constant source of trouble and confusion (so many driver projects and PPAs). My gf has a Linux laptop that stops working after every dist upgrade, and it's always some driver issue (or yet another Ubuntu NetworkManager bug).
Also, if the system isn't shut down cleanly, it will never just boot up again in spite of supposedly using a journaling file system. She always has to run e2fsck in manual mode (i.e confirming every single repair), specifying the address of a backup superblock.
Printing and scanning is broken as well. Not for some niche hardware but for one of the most widely deployed HP printer/scanners.
So on her particular laptop, Linux is anything but plug and play. If you're saying that Linux works well on your laptop I will believe you. It has never worked well an any laptop I owned and drivers have always been the main reason for that.
I believe you cannot simply run Linux any laptop. You have to buy a laptop specifically for Linux.