I hope you're right, but I don't think he dares cancel future debates. The question I think is if Biden will cancel them. Arguably he should. Any sensible person would grant that.
I agree. There is no way Trump will cancel any future debates. He cant resist any chance to spew his rhetoric over and over. I think cancelling future debates, in Trumps mind, would be an admission that he lost, which he will of course not do. Biden is in a bad spot also. No matter how unhinged Trump is, I think it would make Biden look weak if he refused any future debates. I think he could reasonably set certain conditions about stronger moderation and fact checking as pre-requisites for future debates and perhaps shift the ball back to Trump's court. At a minimum, he should insist on independent control of the microphones to prevent Trump simply going on a tirade while Biden has the floor.
I think Chris Wallace tried to be fair, but there simply were not ground rules in effect that prevented Trump from simply talking over Biden.