Thanks to Intel Inside there are multiple ways for Apple’s Mac customers to stay deeply involved in the Windows ecosystem. The Mac and macOS Catalina comes with the dual boot Boot Camp feature which lets any from the past decade to run Windows; or various flavor of Linux.
Plus, there are applications available that let you run a virtual machine on macOS. Boot Camp uses a partition to run Windows as a native OS. Apps like Parallels Desktop let you run Windows or Linux inside a window on the Mac– while macOS is running Mac apps.
What could be better than that?
Boot Camp requires a partition of the Mac’s hard disk drive or SSD storage to run Windows or Linux. Parallels does not. You can run both macOS and Windows (or Linux) at the same time.
What you will need to run Parallels is about the same as running Windows on Boot Camp. A recent Mac, at least 8GB RAM, enough storage to hold Parallels and Windows, plus Windows apps, an internet connection, and at least macOS Sierra, which is 10.12. macOS Catalina is 10.15.
Most Macs going back to 2013– six model years– can run Parallels and Boot Camp with ease.
Why is this important if you do not plan to run Windows on your Mac?
Parallels is a good solution to overcome the one problem that exists with macOS Catalina. 32-bit apps from years past will not run on macOS Catalina. The latest macOS only accepts only 64-bit apps.
However, a Mac running a separate partition or an external SSD or disk drive can also run an older version of macOS which can run older 32-bit apps. That’s what I do. I have half a dozen older 32-bit apps and plugins which will not upgrade to macOS Catalina.
So, I cloned macOS Mojave to an external drive, and when I need those 32-bit applications I just reboot my Mac as needed. And, yes, it would be easier and faster to use macOS Mojave and Parallels, but disk drives are dirt cheap these days and make it easier to move Mojave to any other nearby Mac.
Yes, the Mac still does Windows and that likely will not change even when Apple begins to move the Mac toward its own ARM-based chip designs.