The math on Apple, AWS, Microsoft, and Facebook are not that easy. They are now multi-LOB of companies, with significant revenue coming in from BU's created and

The math on Apple, AWS, Microsoft, and Facebook are not that easy. They are now multi-LOB of companies, with significant revenue coming in from BU's created and run by people who aren't the original founders. Ex: AWS appears to be Andy Jassy, who was probably 30 or 40. Similar and probably even "older" stories for GCP (Google) & Azure (MS). Their supporting "co-founders" may be even older, like Werner Vogels (63).