I have a 2008 Mac Pro that was my daily driver for video and audio production for 16 years before I had to give up on it. The only real reason I had to give up on it was that I couldn't upgrade the software and all the certs were expiring. I was using it for a network music server as well, until Apple broke iTunes home sharing functionality. It's sitting in the hall in my basement. The hardware still functions perfectly. It had four hard drives in it, and I've got all that stuff on a Synology now. It remains the most reliable computer I have ever owned. It literally only was ever off when there was a power outage. I might wind up installing Linux on it for my kids but we already have several little i5 NUCs that are far faster and quieter and easier on our electric bill, so I'm not sure there's much point to that.