I still have my manual lathe, I didn't sell it when I bought the CNC. I would really miss it if I didn't have it. They are really 2 completely different machines with different purposes. I have thought about adding CNC capability to the manual lathe, but keeping full manual operation with an instant change over. I have all of the parts on the shelf to do it, but really have not had a need to do it.
My knee mill is almost instantly convertible between full manual, 2, 3, or 4 axis CNC. Many times I use a combination of operating modes on a single job.