Big Ned
That's true,
But we do need a challenge, and as I'm always raving about, use a good, inexpensive, basic, resilient " no frills trainer" and then there's "no worries" about crashing. ( I won't describe it again, I'm fed up trying to get that message across in other threads!) ).

Wings
Not many! - How about we start a campain to make it mandatory to learn on a taildragger! Well we just love rules, don't we? ( that's another hobby horse of mine, but I won't start!)