And would it surprise you to say that I have, and it was the single most wretched experience of driving I've ever had? No? Well, that surprises me.
Having no sidewall of course reduces flex, and it also gives you a bone-crushing ride along with zero feel from the tyres: You go from loads of grip to bugger all in a heartbeat. As your experience proves you can get used to that which is fine, but for 99.9% of normal people it's useless.
And it still looks ugly as hell.