There can be a lot of value to being able to run really old executables,
but you need the right customer in the right state of utter desperation...
I'm writing a COMPAT_V7 right now to celebrate Unix 50 next year. To be difficult, this is really COMPAT_VENIX for an old 8088 v7 port that I have some history with. There is a wait call there mentioned elsewhere in the thread. I want it mostly so I can run the compiler on something fast...
Maybe not desperation, but at least a little crazy .. it's not clear even a kernel module is the right path since qemu userland might be easier...
Warner