Just idle consideration, given the weird character generator discovered recently, which apparently has 50 odd classes in it.
So much OSR creativity, be interesting to see how large the number of classes people have made up is and the common weightings for witches, alchemists, etc.
The list from just D&D in the past was quite large, or Pathfinder.
Yet another Data Science nerdy project, go through all my games and list them.