Everyone raves about how good 5e is for homebrewing and adding things to, but there is so little of it? I don't mean actual amount of additional content as there are 10,000 of documents on various websites. But there are so few universally recognized homebrews and 3rd party support.

There are a few companies like kobold press, but other than their tome of beasts, i rarely hear about their other products. Frog god games has some good products, but i hear about them even less.

In terms of homebrew you have your popular ones like matt mercers classes (most popular homebrews just in terms of awareness) kibbletastys stuff, matt covilles stronghold and followers (not sure if its popular, i just have been following it) but I rarely hear of others.

Looking at Dms guild as the most popular 5e material, I haven't heard of 90% of the material and never seen discussion on here. I know when I played 3e and 3.5/pathfinder it was super common to see 3rd party material in peoples stacks of paper and books with quite a few books being universally known by anyone who was really into the game. Why does 5e not seem to really follow this trend?

I see so few youtubers or bloggers talking about various homebrews other than their own rules. Build guides or discussions about 5e never say if your dm allows X super popular 3rd party content you can make Y. Even the two homebrew subreddit almost never talk about actual popular homebrew. Its almost all posts of people posting their own content, getting a few critiques then that material is never seen again. Taking a look that top content on unearthedarcana and dndhomebrew over the past month, I don't recognize any of the names or content. None of the material makes it in the general play population (at least the general people who spend time on reddit and other dnd forums). I feel weird taking a homebrew that some guy posted and a handful of poeple upvoted to my gm, vs asking if I can use a matt mercer class or a spell from kobold press.