I thought it was comical that his pitch was "The reason we're going to be successful at Problem 1 (taxis) is because we're going to be successful at ridiculously-difficult Problem 2 (self-driving) which we're not close to solving". Pass.
They were an interesting - but dead - sideline of computing evolution. I never used one, but they had a interesting object-based (instead of file based) operating system.
IBM is a terrible work place if you are technically inclined, if you are a slime ball of a manager it’s perfect for you.
One just builds a specification of a technical system while the other builds a specification of a societal system.
Societal systems just have much more legacy code and inertia with very little in the way of mechanisms for in house testing at scale. There's no development server, just keeping tabs on competitors (ie other countries) to see how the change in production (ie a new law introduced) had second order effects.