I don't think this is relevant. Even on-prem "air gapped" networks get breached. I would say it happens on as frequent a basis as any other network tbh. Microsoft hacks get headlines because Microsoft is a public company; there are lots of undisclosed breaches happening out there.
Security vulnerabilities come from the same place they always have. Where IO happens, where transactions happen, and where an operating system does a lot of work. How attackers get to these points, what happens when they do, and then how the system reacts when a malicious event occurs are the factors that matter.
In today's world of complex technologies, I have yet to meet a single organization that is invulnerable to these threats. I've seen a lot of organizations limit damage, patch vulnerabilities, and generally manage their risk profile effectively - but losses are a part of the business.
IMO, the only thing that will really make a difference is when we have technologies that are sufficient enough to male the user more resilient. Only then can we have a truly safer web.