Yes, but you're leaving out some important context, context which still renders them safer than black plastic.
Regarding stainless steel, that's during production of the item, not during cooking. You'd have to be welding, or using heat hot enough to cut through the steel, to release it in your own kitchen.
Regarding glass, you can check for chips and the condition of your glass far better than you can for microplastics. One is also likely to leech (plastics) over the course of its life, while one is not (glass).
On the basis of chemistry? that hexavalent chromium is formed via oxidation, and I was throwing out basic ways that are used to increase oxidation rates and decrease energy thresholds needed to attack the chromium oxide layers and oxidize the element.
"Could potentially" means I was brainstorming possibilites, I didn't look for a study, I'm not too worried about it. I'd be more worried about Nickel than Chromium, but
it's obviously false that you "need" welding levels of heat to produce oxidized forms of Chromium.
Regarding stainless steel, that's during production of the item, not during cooking. You'd have to be welding, or using heat hot enough to cut through the steel, to release it in your own kitchen.
Regarding glass, you can check for chips and the condition of your glass far better than you can for microplastics. One is also likely to leech (plastics) over the course of its life, while one is not (glass).