The market is irrational. Don't blame checkpointing or any technical improvement: we are in a bear market and will last for long.
My guess is hard cash is valued higher in bear market - SV is more similar to hard cash. Whilst market is discounting ABC for checkpoint, CTOR, DSV, and Avalanche. Experimental/unprovn
How is SV closer to hard cash? I just can't see the logic... Those improvement on BCH does not impact the functionality of BCH as cash. Rather they improve upon the cash functionality.
Betting on SV or BCH or BTC is all about one thing. Do you believe that CSW is Satoshi. If yes buy SV. If no buy BCH. BTC is broken. lightning is a joke.
51% attacks usually don't affect too much the price of attacked shitcoins. While all changes carry risks, I don't believe the market values them to a big extend.