I used to be a patr(e)on of Yanfly for 2 years in the RMMV days. After that incident, I thought he'd leave the RPG Maker community for sure, so I'm glad his plugins are slowly coming back, with lots of other prominent members on board!
I don't have RMMZ or the plugins yet, but I saw some videos and they are more than promising!
Apart from simply being ported, I like how many plugins were merged into one. My old MV project had over 50 yanfly plugins alone and merging some functionality into the core plugins, means a more organized plugin list, that isn't super long.
For those who don't know, the action battle sequences were previously split into 3 different plugins, excluding the battle engine core. Now all seems to be merged into one!
Glad to have you back Yanny, even if only until all of your desired plugins are ported.
Edit: Will we be also getting a "buy all" option, as with the RMMV library?