He takes low risk, profitable companies with proven track records and strong management teams. Geico, Fruit of the Loom, building products and materials etc. Its a very different mindset then what Google is doing when it invests in self driving cars.
Every company thats profitable re-invests those profits in some way. Trying to lump the way Google or Amazon uses their excess cash is different then the way Facebook does (Facebook builds moats mostly) and definitely different then the way Berkshire does.