Netflix's infrastructure advantage was/is in Open Connect. They work with ISP's and ship servers that locally cache terabytes of content as close as possible to the customer to reduce bandwidth costs for themselves and ISP's. Nowadays with higher and cheaper bandwidth there are many CDN's that have similar arrangements with large and small ISP's that Netflix's advantage is not as significant anymore. But even today Netflix's streaming experience is noticeably superior, just not enough for it to be a selling point anymore.