In regards to YouTube:
The thing to keep in mind with YouTuber's, they tend to come and go, and a lot of them make up excuses, instead of just being honest. Some people get tired of making video's. Some folks even get Covid, then disappear for months on end, and come back acting like nothing happened. I learned some years ago, that when it comes to YouTuber's, none of us actually knows any of them, and they never tell you everything about their lives, so its even less personal, then real life friendships. Regardless of what YouTuber's motivations are for uploading their content, and then suddenly not, I won't put any of my energy into deciphering their Enigma code, to figure out why they are being weird lol.
In regards to traditional wet shaving:
Based on the evidence that I've seen, its popularity is increasing. Everyday, wet shaving forums are getting new members to it, it seems like every day, new artisan shops are opening up all throughout the world. And every year, there is at least 1-new razor being introduced and sold. For example, the Blackland Osprey, which is an USA made adjustable high end SS razor, began its build journey in April of 2023, and it became available to purchase, in October of 2023! I myself, purchased this razor in October and I adore it!
Is Traditional Wet Shaving Still Niche?:
When you compare the vast majority of people who use electric shavers and cartridge razors, the answer is yes, traditional wet shaving is still niche. Having said that however, as Gillette continues to raise the prices on cartridge blades, to unreasonable level's, and people are tired of spending 70 to 120 dollars for their electric shaver blade/foil replacements, they are starting to convert over to the ways of traditional wet shaving, via a DE. Why? Because when you can get a 100 pack of DE blades for 15 dollars or less, it becomes quite appealing really quick!
Is Traditional Wet Shaving Growing?:
I would say yes, however slowly. There are always going to be die-hard fans, that will stick with cartridge razors and electric shavers, all the way till they die. But as inflation continues to rise, and everything is costing more these days, people will be forced to become more frugal, on some of the stuff that they buy. For example, a 50 to 100 dollar Turkey, for 4 to 7 family Thanksgiving get together meal, is far more important, then a 50 to 100 dollar electric shaver replacement head.