Actually, explaining that is a good way to introduce the concept of a merkle tree / distributed ledger, and why "blockchain" is specifically for systems without a central authority

This is a very important points, for whatever systems or solutions that you do, do not overengineer and always remember premature optimization is the root of all evil.

It used to be blockchain and it seems apparently ML/AI is the new fad. Most probably majority of the solutions being design now with ML/AI does not need it and in doing so just make it expensive/slow/complex/non-deterministic/etc.

People need to wake up and smell the coffee, since ultimately ML/AL it just a tool inside the many tools toolbox.