I think the second point in the article is the main reason - compensation from Big Tech changes the financial equation considerably. There's still a lot of upsi

I think the second point in the article is the main reason - compensation from Big Tech changes the financial equation considerably. There's still a lot of upsides to starting a startup (as well as plenty of downsides), but the financial upsides are lessened compared to working in tech, and the opportunity cost of giving up a Big Tech salary is huge.