This question already has an answer here:
Pretty self explained in the title.
Yes, I realize there is no widespread demand for them; this is not what I'm looking for in an answer.
I'm looking for an answer that covers more why they can't be built (or aren't practical to). I know that jet engines may generally be better, but I've recently been doing reading on aircraft like the Thunderscreech and it's made me curious why exactly it won't work.