Ryanair could have made it
That is the good thing about RYR and EZY - they are very strict about check in times.
Other carriers should take a leaf out of their books. I have no sympathy for these people that yo usee on TV who leave home intending to get to the airport with 20 whole minutes to spare, then get stuck in traffic.
2 minutes late for check in is as bad as 20 minus late... if you are late you are late.
Then carriers might find that they actually are ready in time to make slots realistically!!