Apple's whole schtick is that they exercise restraint on design so that it works well across many constraints, not just optimizing for one, such as newest or best feature.

I am sure engineering these devices involves lots of compromise, and maybe they did not find sufficient benefits to outweigh the drawbacks for those other features.

Maybe it is possible they swing the pendulum too far into the cautious territory, but given their track record, I would not bet on it.