I’m glad people are paying attention to the fact bench grinders can be dangerous. Yes they can kill and maim but so can everything else in the shop if not maintained and used with respect. It’s also why I don’t let just anybody waltz in and use my grinders. They are most dangerous in a big shop when some idiot can jam something in one and then walk away. In a case like that the wheel should be removed and inspected and checked that it still rings. But in a big shop that never happens, it’s just left for the next poor guy. But as far as I know a wheel that rings mounted properly has never exploded.
It seems the quality of wheels is not what it used to be, but in my case I’m happy there’s a fix. Bench grinders and wheels last decades if properly taken care of.