Thanks. There would be no such inconvenience for me. I flew into Class C once or twice during flight training back in 2011. Haven't been back since then. However, I plan to fly into Tulsa on a semi regular basis in the future. The airport I will use is in the outer ring of the airspace and I could actually slip in under the veil. I figure that will represent maybe 1% of my flying, so dropping a few thousand bucks for that seems silly to me. Of course, when my transponder craps out, I'll just get the mode-s.
Because some of us don't like spending money on something that we won't use. If I ever flew into congested airspace, I would want it. It makes perfect sense for those that do so, and I'm glad that the technology is available for them. If I ever flew into congested airspace, I would want it too, but I don't. OKC and Tulsa Class C would be the most probable places I would need the Mode S transponder, but those airspaces aren't crowded enough, and I don't visit them often enough, for me to feel the ADS-B In is all that useful to me. Of course, that's just my situation, and I don't claim to speak for anyone else. I would imagine, however, that there are many more like me. That said, there is a decent possibility that my already old transponder will crap out sometime in the next 4.5 years anyway, so I'll replace it with the mode s. Not a huge deal really.