Yeah, Win10 is very drive performance dependent. You can run it fine on a Pentium 4, but you need an SSD.
Most of my users, some even over 70 with little computer experience, are doing fine on Linux, but I "converted" them before they had to experience that awful mess, so it has been relatively easy: from XP or Win7 to a customized XFCE (its defaults are ugly and unpractical) has been a breeze.
Correction: Its defaults are ugly and unpractical on Debian. It looks a lot nicer on Manjaro for example.