TLDR version - No vapes, or virtually all vapes, are no stir. How much of your actives do you want to dump as ABV?
I've seen more than a few vapes mentioned here as not needing stirring, but I know can give another hit or two if you do. FWIW, I'm a cheap ass that tries to get the most from every nug I can - even if that isn't always going to dark coffee brown ABV. I also save my ABV for other stuff when at home, so am getting those actives one way or another, stirring or not.
A good example would be the VapCap. You don't have to stir it. Often when I'm out and about I'll dump when the vapor stops and reload. However, after what is probably hundreds of times, I find that a dump, stir, reload will ALWAYS produce at least one more worthwhile hit. Easy enough to do... I just dump the load into the cap using the little stirrer on it, cover with a finger, give a quick shake, and suck it back up while sliding the cap back on. The only relevant condition here is that I keep my screens at full depth. Could be a little different with shallower loads - but IMO that would just mean less wasted actives.
Have found the same to be true with many of the vapes listed here - even the mighty Volcano. From what I've seen, a stir when things start slowing down will get you another half bag.
Same sort of, but the other direction, with a nano. I stir after 2 - 3 hits, no matter the size of the load I have in, and try to squeeze at least one more hit out of it. Sometimes, on smaller loads, no joy after the stir. So, am assuming that stir and next hit wasn't really worth it, because there wasn't enough left in the load to create worthwhile vapor. Other times, when sitting back and casually vaping with a larger load, a stir after every couple hits can take me to 6 or more decent ones on the same load.
One that really puzzled me above is the need to stir an EQ. I haven't fired mine up in almost a year, but IIRC the load is constantly swirling in the chamber as you hit (if not filling bags on highest fan speed or drawing too hard). It is the only one I see here that I would say qualifies as no stir, but that's only because it is constantly stirring (swirling if you prefer) while you hit it by design. Using an elbow pack or pulling too hard (and sucking the load up into the elbow screen) will of course require stirring or a dump and reload. A well done quick, short blow into the tube will knock it back down, but probably not best for your EQ because of possibility of getting finer material down into heater area. But whatever, it works.
Much also dependent on strain, temps used and technique. But, if you're not stirring ANY conduction or partial conduction vape, you're probably dumping actives out with your ABV. Even more the case with any purely convection vape unless you are loading very shallow loads. AFIK there is no vape that evenly heats the whole load in any type of chamber, so there will always be bits that have been "vaped" more and bits that have been "vaped" less, unless the load is actually swirling around and stirring itself. I don't see how you can get all of the same actives from the areas of the load that have been vaped less without a shake or stir.
Or, am I missing something here?