Regardless, someone did try to blow up a plane with explosives hidden in their shoe. It's a very well documented incident.
After that incident. Security was stepped up globally, we had to start putting shoes to be xrayed, and we never saw a single case of anyone trying to smuggle explosives on board in their shoe ever again.
If it's removed completely, it's because they have other methods that make it obsolete.
Aviation rarely make the same mistake twice (Boeing goes hold my beer).
When I was a kid, I got to step inside the cockpit and say hello to the pilots and look at all the instruments, mid flight. After my grandmother asked if that was ok. Fat chance of that ever happening again after 9-11