I've not had one tech problem on the Q400 in over 11 months. Grow up all of you.
You've been VERY lucky then, the Exeter Dublin service has seen quite a few delays over the last while for "technical" reasons, including one flight I was on where the gear doors developed a mind of their own, and were independently going down and back up again without any commands from the flight deck, which resulted in a return to Exeter and a change of aircraft some 3 hours later. It was all handled professionally, so no gripe or grouch there, but whatever it was that caused the problem, it wasn't immediately apparent, hence the swap to a 146 that was positioned in from Southampton. I never did find out what caused it, and it was clear from discussions at the time that the original thoughts were that the problem was a faulty flight deck indication, so when I mentioned that the doors had been transiting, that appeared to up the ante somewhat!