I think this was a fairer video/challenge than what he gave Aikido originally in that wrist lock video. The root of his argument is a lot of what's wrong with MANY schools and styles and I agree with his core argument here of the need to pressure test and to train against resistance. I'm glad to see he got some good responses, also, thanks to the OP, I found a really good set of Aikido videos that were posted in the comments section but have not been evaluated by Rokas yet thanks to your link, which is good discussion for the Aikido thread we have going in the general forum.
I'm honestly surprised to see him call out wing chun specifically, in my limited experience with it it always struck me as the most practical and easily demonstrable form of Kung Fu. I had a tailor from Hong Kong many years ago who taught me chain punching and the rolling hands, I still use both and train both and would love to learn more were a teacher available. The problem with only a limited number of schools training for realism is something I have observed throughout Chinese martial arts but also throughout most other systems. Aikido is perhaps the worst about this, which makes me sad, I really think there's not even a 1% margin of schools outside Japan that teach it in a useful way and its very subject to ******** artists. I think the numbers go up in Japan but with traditional Japanese budo, you still need to take the time to learn to apply things practically.
I would still like to see a much more positive community review of what's out there, because even when you do it honestly like he has here, it encourages that toxic style versus style stuff. If we can get the overall community within martial arts to agree on the need for these kinds of reforms, I think we will see a big re-discovery/renaissance in martial arts as a whole. Something similar happened with HEMA and the western martial arts and its led to not only a better historical picture of what exists and has existed but a community much more open to looking for what works. HEMA and the Western martial arts have issues like anything, but I can watch "The King" on netflix and see their fight choreography is loads better than braveheart or anything else was years ago, because now there is real expertise out there in some of those forgotten western disciplines and the cinematic depiction much more closely resembles some of those old fight books.
Bujinkan is facing a sea change now that Antony Cumins is translating the actual Ninja scrolls and clarifying the reality of "ninja" martial arts. It's maybe bad for Bujinkan but its better for everyone who wants historical and maybe more functional "Ninpo". I would like to see more of this kind of stuff with Aikido and maybe more emphasis on checking Daito Ryu/ Judo and pre WW2 Aikido as well as integrating Aikido into a more mixed or practical style with these methods.
Here's the video I was talking about, its not perfect but its a guy here in the states trying to develop/train/explore using the Aikido fundamentals in a broader and more practical context.