A big difference compared to one or two decades ago is that a lot of domain-specific services have moved to web applications. So, there are probably a lot of machines out there that are just glorified web browsing machines.
Also, the popularity of iOS and Android have made more applications cross-platform.
Of course, once Office documents or legacy Win32 applications are part of the equation, you can't really beat Windows. It is a common misconception that LibreOffice could replace Office. I use a Linux desktop and a MacBook and most of the Word/Excel paperwork that I have to do (luckily irregularly) does not open correctly in LibreOffice. Of course, it is an uphill battle for the LO folks.