to add to this, a lot of what was sold as ecstasy (at least back in my day) contained little to no mdma at all and was typically just a cheap upper of some sort. originally ecstasy was close to 1:1 slang for pressed mdma pills but over time it became more attached to the pills and less to the molly specifically (mostly for marketing purposes).
of course you can crush x and snort it but at that point it would probably be more accurate to refer to it as molly or speed depending on what’s actually in it.