Holy crap. Now there's a name I haven't heard in a long, long time.
To give some perspective, the last public release of DikuMUD was in 1991.
Weirdly, my initial thought there was "that's only 9 years ago", and then did a quick double take when I realised that it wasn't.
Turns out: Quite hard. I have a newfound respect for airline pilots.
On a related note, even my RAF cadet experience 20 years ago counted for naught. Whilst I could keep the plane in the air, landing proved the most difficult, and I crashed and bounced and would not have survived without invulnerability switched on.