I moved my immediate and mostly non-tech family to all run Linux including an aging relative who needed a locked-down Firefox install to keep her from falling victim to predatory sites and extensions. Pretty easy to script the entirety of the OS install and lockdown so that it was documented and repeatable. Can't do that without techie roots but I love that it's possible and mostly straightforward from a scripting perspective. It's almost exclusively get the right file with the right config in the right place and restart a service.
The only major day-to-day downside IMO is battery life on Linux laptops. Can't compare to current generation of Macs but that's true for Windows too.