I still feel a genny with mesh gives the absolute best vape of anything I've tried, from nic delivery, flavor, mouth feel of the vapor, etc. Buy there are two major issues I was never able to iron out with genesis devices even after plenty of effort, and that's leaking and random dry hits/tilting requirement.
I'd prefer a dual coil build around 35-40 watts, and I was never able to get any gennys to both stay leak free AND chainvape at those power levels. I could do a leak-free build, but then it wouldn't wick well enough. I could do a build that wicked amazingly, but then it leaked horribly. Trying to find a sweet spot between the two just gave me the worst aspects of both (leaking and slow wicking)
There are also a few other minor issues with gennies, like the juice cooking, and it seems like a little more power is required compared to a cotton build. On occasion I'll break out the Kraken or AGI or something and throw a build on there and I'm always rewarded with an amazing vape. Then I accidentally lay it on its side and the tank drains, then I forget to keep the wick on the bottom of the tank while taking a vape and get an awful dry hit, then I go back to Kayfuns
It appears gennys are becoming more of a niche instead of the standard for rebuildables like they used to be, but there are still plenty of people who use them, and still high end manufacturers releasing them, so I think they'll stick around for awhile. Must be a good time to be a genesis user, you can find so many genny devices dirt cheap these days!