> That’s more of a training / staffing issue than a tech stack issue. I mean sure, but the same could be said for distributed systems. What breeds reliability

> That’s more of a training / staffing issue than a tech stack issue. I mean sure, but the same could be said for distributed systems. What breeds reliability is qualified personnel working on a system that they understand. Slapping an IBM logo on the front doesn't make something more reliable, and stacking proprietary technology that "transparently" moves subsystems between datacenters only increases the training burden. Mainframes became a victim of their own moat. While proprietary .magic. can hold people in, those very same technologies also keep new people out.