QEMU on Linux does work as it solves the driver issues with virtual hardware. The 2008 Dell XPS runs Mojave fine except for one problem - YouTube stutter. I am not sure if this is due to audio issues but I suspect that it's due to the network. There is a network performance improvement called bridging that's recommended but it's a moderate amount of work to do. Everything else that I do on this system is fine. It would be ideal if I didn't have to run through QEMU but I only got that to work once and haven't been able to replicate that. I will keep working on that system though. I just need this as a reference - if I can get it to work well, then a lot of options open up for used equipment.