> after two failed attempts to move from AWS to Facebooks metal failed spectacularly

Seems more like a problem with FB onboarding them and their tech. With some of the smartest people in the world they can't solve problems like this?

> Startups should reconsider their metal, as future acquirers will likely heed this lesson strongly.

Makes no sense. Startups should focus on product and users. Scaling on AWS is somewhat of a no brainer giving more time for what's important: product and users. This seems more like an outlier situation in which FB really didnt care.