I've always attributed it to the fact that developers typically have really good hardware all the time. When you develop on a great machine, you don't give the

I've always attributed it to the fact that developers typically have really good hardware all the time. When you develop on a great machine, you don't give the performance of older machines as much consideration. Software now typically has a mandatory upgrade path, so even if there is a version that works well with your hardware, you may not be allowed to use it.