They didn't say all engineers, and I certainly wouldn't assert that. But I've definitely seen it personally at 2 early stage startups, a moderate-ish size business, and a Fortune 100. Just a handful of people, but they were very open about it. Those around them simply participated in the conversation and didn't judge.

It was never framed as "abuse." It was talked about very casually as a tool to get more work done, and they deliberately sought out an ADHD diagnosis for access.

I'm in no way judging. They DID get a diagnosis and are using it as treatment. The reason it's relevant is because _they_ talked about it as a tool to get more work done, or a way to be "on" after a late night. Not as part of treatment. But there are tons of reasons why that could be, none of which can be assumed.