I have my mum on iOS on her 2016 Macbook which was new when she bought it and we've kept going since. I run updates and time machine each visit. She manages Chrome or FireFox as browsers and Libre Office for documents (and she is uneducatedly dyslexically horrific with a spreadsheet regardless of application).
In a way as long as it is stable, consistent, you have the useful apps in 'the place for apps' I think it can work well. Windows is however hell.