Well, there is software that will let you run Windows software on a Mac. But it's there, and people use it all the time. It works fine. You can even install a PC compatibility card if you want to. You can even network a Mac with any PC machine.
People do that routinely, also.
I'm excited about the new Mac OS8, and I will probably end up getting it. I'm using currently, or so they say. Although my system has been nothing but stable for me. I don't spend all of my time upgrading in order to run new software. It just runs, period.