I'm seeing articles about the possible demise of the Note lineup.
I use my phone almost always with the stylus. I would hate to think that Samsung is contemplating ending the Note series.
I would hope with new battery technology, internal space for the S Pen would be less of an issue.
My vote, keep the Note series alive.
As you were ...
There have been rumours before that the S and Note Series might be merged , however it has not proved to be the case thus far. As far as I am aware the intention at the moment is just that the S21 will have S Pen support but not a Docking Slot. https://pocketnow.com/samsung-galaxy-s21-ultra-might-offer-s-pen-support-but-no-docking-slot