Many people I know hate the way the Mac has copied the iPad. I guess Apple feel they can sell more Macs to people whom already know their mobile products. It has made the Mac more a "consumer product" but in the same way the annual major upgrade of macOS has introduced unreliability.
I did not know any difference really, I only used Mac Os for doing some things, never really used the OS much.
But I can understand what she means, it was the same when we went from Windows 7 to 10 and more so to 11.
As for reliability, my Mac have been very reliable
Never say never, on the right hardware Windows is now quite competitive. As the ARM architecture from Qualcomm gains ground (for laptops) things will be very interesting.
It may be interesting, but believe me, she will never have a Windows machine. She only had one and and that was Xp and she said she would never have another one.
she have always been a Apple person, computer wise anyway, going back to G3 and G4 macs.
She still has a few.
There is always a new chip, any time you look, something coming. 
True, i thought it was slowing down a bit PC wise, a newer PC is not a lot of different to a PC of around 5 years old.
Arm is a different thing.
Still got to think about updating my gaming machine, but not going crazy and in no rush, it is still working.
i done spending now for a while, hardware wise, with the printer and Cricut.
Adrian
Desktop machines Mac mini pro with macOS Ventura, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,