Skyrim came out in 2011 and is at this moment, the 55th highest player count on Steam. Just playing top tier single player games over the past twenty years could keep you incredibly busy.
Are they even the same base SKUs at this point? I don’t want to pull out my gaming desktop but IIRC it was at least three different entries in the Steam library. I wonder if the stats combine them.
At this point I’ve spent so much money on Skyrim titles I should get TESVI for free with lifetime DLCs.