One of the things I find hilarious about YouTube is that a lot of the big camera influencers talk about leveling up channels and increasing production value, etc. A lot of the bigger names have between 50-200k subscribers and a lot of them had the advantage of being early to starting camera channels. Newer, theoretically popular people like Cam Mackey have like 65k.
Meanwhile, a friend of mine decided to do something with his YouTube channel a couple of years ago after the news did a story about his having purchased the monorail for $1/car from our local zoo when they stopped running it and turning it into a private campsite on some land in Wisconsin. He mostly repurposes junk that he finds at garage sales and thrift stores into things like push-pull carts on railroad tracks and satellite dishes coated in aluminum foil. The cameras he uses are mostly potatoes - like 25-year old camcorders and Hero 3-type stuff. He has a pretty decent natural grasp of editing and story, though, and he's a funny guy. He also would freely admit that he neither knows a lot about cameras nor cares to know any more. Last I checked, he was at about 187k subscribers (including me - I like watching his stuff).
So if the goal is just to grow a YouTube channel, the quality of the camera is probably the least important bit. Making half of your video be slow motion slideshow garbage so that you can put "cinematic" in the title doesn't really get views if the rest of the content is garbage.
I buy too much gear for my own mediocre talent, but that's partly just because I want it and after a lot of years, I can almost always find something to trade in to make stuff more affordable. I have no illusions that buying a Komodo-X will substantially improve anything I do, but I might do it anyway. If I get it, I'll probably like it a lot for a while and then after a couple of years, I'll probably trade it in toward something else.
Anyway, another thing to remember with these YouTubers that are in the business of making day 1 review commercials for various channels - when they're showing "what this camera can do," go watch their older stuff with a camera from last year. Most of the time, it looks almost exactly like whatever they're doing with the new camera because they're really not that different. One of the most laughable things that people say on various camera forums or YT comments is "I can't wait for (creator name here) to get it so we can see what that camera can really do." Wanna know what that camera will look at when your favorite creator gets it? Go watch the review they did of the camera before it. It'll look pretty much like that.