A lot of lab stuff is single-use plastic. But that is more on the bio side, that wouldn't work for chemistry. And there the glass is simply too expensive, so yo

A lot of lab stuff is single-use plastic. But that is more on the bio side, that wouldn't work for chemistry. And there the glass is simply too expensive, so you have to reuse it. It's also not just flasks but also coolers and e.g. distillation bridges. Those are much more complex glassware.