I have 1 mainframe, and which I had 500 PCs... It's solid engineering, but it's also a lot of branding. If you have a "golden egg" application that have a lot

I have 1 mainframe, and which I had 500 PCs... It's solid engineering, but it's also a lot of branding. If you have a "golden egg" application that have a lot of internal state so you can't run it on 10 servers, then a mainframe might be a good solution to keep it running. I think the most common reason to have a mainframe is that you happen to have too many managers that used to be mainframe developers.