Well the world ain't linear friend.
The long story: I have always used NFO, just a bit to get the leather smooth and pliable again after dyeing etc. And like the mighty bumblebee I've painted and finished over it to no ill effects throughout the years.
Now, checking YT etc I see people like Don Gonzales basically propagating the use of olive oil so I try it out and it works fine. Thing is, besides a few B/W Sheridan style pieces where I used black dye and acrylic finisher (or wax) I didn't paint any projects, hence my post to check the HowWhenWhatnow.
One thing I have noticed using regular oil is that you need to use more to get the same effect as NFO, so wondering if that may have an effect on any acrylics.