Looks like I wasn't the only one ghosted by the CEO, so I'm not going to repeat what someone else has said about him. Writing this so no one else wastes their time interviewing with him.
He basically gave me an offer and told me to get back to him by the next weekend whether I'd like to take it or not. He mentioned a salary compensation alongside the equity, so I followed up with him basically two days after the interview saying I was in that I was process of quitting my current job but wanted to get an exact estimate on the salary compensation because I still need to support my family.
It's been two weeks and he has still not responded, though I know he's seen my email. For someone who's done some impressive stuff for Uber in the past, he's extremely inconsiderate. I hope no one bothers interviewing with Mylance, let alone working for him. If that's how he is while interviewing candidates, I don't doubt he'd randomly fire someone out of nowhere, even in this recession.
TLDR; gave me an offer and asked me to get back to him, which I did, and he ghosted me.