Well, PayPal certainly paints a pretty picture. I’m more interested in what is unsaid. How big are these applications? 20k LOC each? 50k? 100k? The larger the application, the more challenging it is to maintain, to ensure its reliability.
How reliable are these applications? Will they tell us how much downtime they experienced in the course of a year, for example?
And most importantly, if these applications are truly big, how much difficulty have they had in maintaining their code base? How costly? Understandably, for competitive reasons they may not want to reveal the answers.