Just had a "weird" but positive experience, recently I was flying ARN-HEL and encountered something exceptional I have never seen:

I was in good time at Arlanda, went up to the lounge. Planned departure 11.30. At around 10.50 I looked at screens and there appeared "new departure time 11.20" written with red font. I thought "no again we are late" assuming there will be new information about new departure time at 11.20. Then looking out the window I saw the plane was there at the gate, what?? Soon thereafter, at around 11.55 the screens said "go to gate" with green. So I thought I gotta go even if I did not believe what I saw. Indeed boarding started soon and the boarding was finished at 11.05, then we waited till 11.20 when the plane really departed.

It is no news that AY flights have taxied off earlier than departure time, which is one of the upsides I like Finnair. However, I have never seen that Finnair has RE-scheduled departure time to an earlier time during check-in. I chatted with FA shortly, "what about if someone has done OLCI and arrives late at the gate?" She told me "then we have to wait" and continued that there must have been many pieces fallen right on this occasion to be given an earlier departure slot just like that.