My stepdad is a great and nice guy, and I've suspected for a while that he might be autistic. He's very quiet and reserved, rarely shows strong emotion. Chuckles rather than laughter. He's also fixated on certain things and hobbies, and can talk/ramble about them for quite a long time. He likes puzzles and, what have been given to him, legos. Putting together and taking apart things.
Like I said, no hard evidence, but I could see it.
Pretty much everyone in academia and engineering that I've met I clock as being at least a bit autistic, though relatively low support needs. The people who identified as "less autistic" or "not autistic" were either weirdly low trauma or had some political motivation to worship normality (e.g. conservative gamer bros at uni).