We used to have 2 engine turboprops, taxying in on one engine. Then one day an unfortunate minor tech snag led to a loss of hydraulics at 'just the wrong point in time' resulting in the aircraft becoming embedded in the terminal. Ever after, we taxied on both, convinced we'ed learnt our lesson.
Sadly.....
Then we got 4 engined jets. Shortly thereafter, an unfortunate combination of circumstances (including taxying in on 2) led to an aircraft becoming embedded in an airbridge....
Deja vue,
CPB