My wife is encouraging me to replace our 3 year old mini with Snow Leopard Server (being used as a server) with a new aluminum mini (possibly not the "server" model) running Mountain Lion and Server. She is concerned about the reliability of the old model. So far I've had to replace one of the internal drives, which failed somewhat gracefully, so there's been little down-time. And nothing other than the hard drive has failed. Back then the mini was considered the most reliable Mac. Anyone with actual figures on how the new minis fare? Would I be trading in a old but aging reliable for a can of worms? Or would I be gaining a potentially more reliable system? [Added] Another concern is the dual drive server model versus a single drive model. Does putting two drives in such a small enclosure cause heat problems? Is the single drive version a safer choice? Note that in the server service here, the old mini is more than adequate in terms of performance, although the quad core is tempting for reducing the CPU peaks.