el-remmen
Moderator Emeritus
IMO outside of emergency situations, ending a session in the middle of a combat is a failure of timing by the DM. The difficulty of avoiding it, however, is heavily dependent on how flexible the end time is. Most games I've played have had very flexible end times, giving the DM a lot of leeway to pick a good stopping point. If a game revolves around real life events, such as babysitting, then this can make it much harder to time right. Fortunately my current group has a 4-5 hour session window, giving the DM plenty of time.
Thanks for saying I'm a failure as a DM!


But what you describe is essentially what I described in my first post: back in the old days time was flexible and less limited, so I can't remember that happening. If a combat started at 10:30 PM and it took til midnight to resolve, we didn't care!
These days the smaller window (I play five hour sessions with one group and three hour sessions with another) means not only it is more likely to happen, I am less likely to want to push this way or that to make sure a combat begins with time to finish it or (GOD FORBID) end early, when every D&D minute is precious!
And as humble minion suggests, I am loathe to not let players do what they want to do for timing reasons, unless instances count where I hurry through or handwave some scene buying rope at the general store or something minor that players occasionally get hung up on.