How many pumps does it take?Although I have the AIO wine pump I use it for everything but degassing. Racking and bottling are far more important uses for it.
For degassing, I've repurposed (or added a purpose for) the AIO Head Space Eliminator. I have an old Vacu-Vin and have combined that with the head space eliminator. I've posted about this before, with photo.
Here's the link to that post: Oct 20, 2019
It takes a few days to degas completely but I don't have to open the carboy and don't have to introduce any air or oxygen into the wine. Plus, I get a little exercise out of the process!
Also I thought a little bit of oxygen, such as through rackings helps with aging, why go through the trouble of vacuum racking?
Commercial wineries age in oak which also expose the wine to oxygen, this makes the wine subjectively better.