>TPF is not modern. It would fail every architectural review a contemporary engineering team would apply to it. It also handles 50,000 transactions per second with sub-100ms latency on hardware that costs a fraction of an equivalent cloud footprint. It has been doing this for 60 years.

What kind of review would it fail? Sounds like it's pretty well designed to me.

FWIW, IBM has been increasing TPF costs dramatically since mid 2000s, which prompted the GDSes to go through decade-plus efforts to migrate away from it, to the cloud.