Talk about shredding

You're right. Polycarbonate is 250 times more impact resistant than glass, while acrylic tops out at 10. Also, poly can be be engineered to retain a degree of flexibility. Acrylic will crack if drilled close to an edge, poly won't. Acrylic is slightly more transparent and scratches can be buffed out as opposed to poly. Having said that, there was, a now defunct company in 2016, called Invizaboard, that tried to come to market, but ultimately failed. You can still find their bleached bones on Instagram. The boards were just too slippery, too heavy and too fragile.
Braille Skateboarding on YT has multiple videos of them trying out both clear plastic and actual glass boards to varying degrees of success.
This has more info with links: https://www.popularmechanics.com/adventure/sports/a23051/bulletproof-glass-skateboard/
https://www.theplasticpeople.co.uk/blog/the-differences-between-acrylic-and-polycarbonate/

This is Braille skateboarding, they skate boards that's mailed to them, this was about 5ish years ago.

Yes, and they've got more current videos, only a few months old, where they're still dicking around with clear skateboards.