I keep hearing concerns about the 2020 SS tip with draw resistance. I really like the '19 tips I've used so I might just stick with them.
A couple other thoughts I've had about the DV experience. My latest wood stem has no airhole or carb. I don't miss it in the least. In fact, it is refreshing to not have to search for an airhole with every hit.
Also, I assume that folks understand the difference between mouth vs lung pulls. I would have been out of the DV world a long time ago if not for two things. One is using an induction heater over a torch, the other is learning how to properly do mouthpulls. Again this is my preference YMMV, but if folks are having trouble enjoying their new DV because they are trying to suck down vapor the way you would with many battery powered vapes then maybe this is the issue. In the beginning I was doing the direct to lung draw and would tire out my muscles very quickly. Then I learned the mouthpull method made famous by @Squiby.
In a nut shell, instead of long draws all the way down, you mouthpull like you would with a cigar, then suck it down in multiple small draws. You only draw vapor into your mouth first, then suck it down in a two step process. This made all the difference for me. I know she posted the steps on the old FC and if I can find it I'll link it here. But if you haven't tried this and are suffering then you must give it a go. For many who have been here a while it is common knowledge, but I post this for those out of the know.
edit: Below is an excerpt from a post by @squiby on the old FC. I hope it's ok to do it this way. She talks about learning this method originally from @naturalfarmer.
"So, this is it. Toking often is done by simultaneously drawing in vapor while inhaling it into your lungs. The classic joint toke.
Instead, try pulling the vapor into your mouth first, similar to puffing on a cigarette. Cover the carb of your Vapcap to restrict air flow, pull some vapor into your mouth but do not inhale, yet. Imagine that you are sucking up a thick milkshake through a straw. Once the vapor is in your mouth, near the end of the toke, uncover the carb momentarily, then open your mouth and inhale the cooled mouth vapor along with fresh air into your lungs. No need to hold in the vapor endlessly, it enters your system instantaneously, so you can exhale in a reasonably normal way."