Tempered glass, acrylic, or polycarbonate backboard?

Specialist-community threads on r/Basketball are clear: tempered glass gives the truest rebound and a gym-like feel, polycarbonate (often branded 'shatterproof') is the most kid- and weather-proof but rebounds dead, and acrylic sits in between. Reviewers note glass is heavier to install and can crack if hit by hard objects, while polycarbonate yellows and dulls outdoors over years.