It's a bit weird that you think Hollywood is only 5 studios. That would be like saying Silicon Valley is just FAANG. There are dozens of studios in LA alone, not including the studios in NY, Atlanta, and Vancouver.
Netflix is the 5th biggest studio in Hollywood (the industry) but is the biggest studio actually located in Hollywood (the neighborhood of LA) as the other major studios have their own facilities in other neighborhoods or cities of LA. (Sony = Culver City, Fox/Disney = Century City and Burbank, Paramount = Mid City, Universal = Universal City.)
Comparing the end credits for Netflix originals and Disney films, I see no difference in the amount of vertical integration. Netflix films generally aren't VFX heavy so there isn't as much outsourcing that needs to be done. Disney films are, and most VFX shots are outsourced since (a) it's cheaper and (b) the specialized VFX shops are usually faster and more nimble than in-house VFX teams. Compare the end credits for thein-house VFX-heavy Netflix original like Bright and Mute. They have just as much outsourcing as a Disney film.
(Source: I count Fox Searchlight, Vendome, and Sony Pictures as former clients and I currently work for a media company. I'm well versed in how movies are made.)
Netflix is the 5th biggest studio in Hollywood (the industry) but is the biggest studio actually located in Hollywood (the neighborhood of LA) as the other major studios have their own facilities in other neighborhoods or cities of LA. (Sony = Culver City, Fox/Disney = Century City and Burbank, Paramount = Mid City, Universal = Universal City.)
Comparing the end credits for Netflix originals and Disney films, I see no difference in the amount of vertical integration. Netflix films generally aren't VFX heavy so there isn't as much outsourcing that needs to be done. Disney films are, and most VFX shots are outsourced since (a) it's cheaper and (b) the specialized VFX shops are usually faster and more nimble than in-house VFX teams. Compare the end credits for thein-house VFX-heavy Netflix original like Bright and Mute. They have just as much outsourcing as a Disney film.
(Source: I count Fox Searchlight, Vendome, and Sony Pictures as former clients and I currently work for a media company. I'm well versed in how movies are made.)