The average HuCard is pretty lame, too. My point is, on the VC, a lot of people are buying the game they heard about but never played (that game being Bonk). However, it's an old game, and the control is somewhat sloppy. That was a complaint of mine when the game was new, even. So these people who never played a TG-16 are downloading this old game that holds *zero* nostalgic memories for them, and they're discovering: it looks old, it sounds old, and it plays old.
That's why, as Seldane pointed out, people on non-PCE forums are bashing the VC version of Bonk. They heard for years that it was the "Turbo's answer to Mario and Sonic", and they're underwhelmed. It's got nothing to do with TurboChip vs HuCard. It's got more to do with Bonk not having the same timeless appeal as Sonic or Mario. Bonk was a decent (but not great) game that TG-16 fans rallied around because they had nothing better.
The above covers my feelings on Legendary Axe, too. I'd be curious to see what members at non-PCE boards say once that gets released to the VC.