@Kyrinov, you have interesting things to say - thank you for sharing them with us.
As for me, I don't think I'm different than most people in that I trust my gut about what's a good direction to go in. Buteyko breathing's basic premises resonated with me as soon as I first read about them - I tried to practice them on my own, did achieve a small measure of success, and then went on to study and practice seriously and the results were life-changing in ways I've discussed here before, the biggest of which is that I am no longer taking any medication for asthma and allergies after a lifetime of major symptoms of both things. (As I read what I just wrote, it reminds me of what so many people have said about StrongFirst - they read, they tried on their own, they knew it was a good path, but things really took off for them once they took the course or a cert.)
I do not find myself interested in what Wim Hof has to offer, and I'm just going with my gut. For me, a life well-lived has both soft and hard aspects, yin and yang, if you will. My strength training is focused on the hard aspects, while my Buteyko breathing has done wonders for the other side.
I will note, for anyone following along, that when I first began to champion Buteyko breathing here on our forum, I was practicing about an hour a day in two sessions, and telling people they would need up to two hours a day for at least a month to make progress before they could scale back their time commitment because that's what my teacher told me and it's what I did, with excellent results. I have since found, both for myself and for my students, that good levels can be maintained with much less time. Indeed, I've seen some of my students go against my specific recommendations and still make progress, perhaps because grasping the underlying premise and putting it into practice in almost any form is a helpful thing. I do a walking practice that takes 15-20 minutes, and I do this most mornings about 30 minutes after waking. (And I get in a little walking, sometimes even a little running, a nice "side" benefit.) My other practices are still in my life, but I do them occasionally only and my overall result is still very good, and I can achieve almost everything I used to at any time.
Last but not least, the search engine on the forum here works well enough - it can't give you a priority-based result, but if you ask it to search for Buteyko or any other term related to this discussion, you'll get all the hits back, presented in chronological order, so you may have to page through them to find what you're looking for if what you're looking for isn't recent. We do support tagging posts by topic here, but it's an underused feature.
-S-