His email is right there on his website, I say just write to him!
Yeah - 100%. I have pulled this off successfully with some crazy household names in tech. I really value some of those random emails - I go back and read them from time to time.
People are often really chill and kind about answering questions and love to help people who take a genuine interest in their work!
Yes, but imagine the luxury of casually hanging around with Bellard for a day and just ask random stuff you come to think of, no regrets.