Barring any sort of technical wasteland level breakdown, it seems pretty evident both Endurance Runs will run their course through the whole game. If any of them were going to quit out of frustration, they'd've done so by now. So my question is this:  
 
how many episodes do you think are left? 
 
There are, of course, many variables that can affect the total number of episodes: overall game length, percentage of side quests attempted/completed, getting stuck/lost, varying lengths of the episodes themselves, etc.  I'm curious to see the difference in answers between people who have played/finished the games and those who're simply watching the Endurance Run.

They seem to be getting to the point where they at least find out who the killer is, so all that's left is to catch and maybe kill the guy. But Vinny and Jeff just spent the last two episodes basically playing darts, so I'm going to guess another 10-15 episodes tops.

Not really sure. If I remember correctly, the game is getting to a point where it kinda ferries you from one place to the next so there really isn't as much of an option to do sidequests. There is quite a bit more that happens though. I'll say... 15? Sure, why not?

I'd say somewhere around 20, maybe each team's will vary. I don't exactly know how long the game is though.

However many it takes to finish the game.

" However many it takes to finish the game. "

No where near as many as the P4 ER.

If they decide to say '' fuck it'' and blow through the rest of the game: I assume 15-20ish episodes, depending on the length of the episodes themselves.
 
If they stick with doing some sidemissions that number increases to 25ish episodes.

VJ will probably finish up around 40, I'm guessing. BR might last longer since they've been spending more time on side missions.