The FAA has very quietly tacitly admitted that the EKGs of pilots are no longer normal. We should be concerned. Very concerned.
After the vaccine rolled out, the FAA secretly widened the EKG parameter range for pilots so they wouldn't be grounded. It looks like the vax gave at least 50M Americans heart damage.
No they can't. That needs a huge infastructure of radar, comms equipment, and other items such as real time routing of air highways. Not to mention emergencies, emergencies can only be dealt with by humans as humans can think.
Source: 40 years aircraft servicing.