In the original comment you mentioned the open web put roadblocks in the way of progress due to idealism. So, if you could say what those roadblocks were, and how the idealism supported them ...
Presumably you're not accusing "open web" activists of having ideals that favour inhibiting bandwidth, or hosting content on slow servers, so noting that proprietary ["closed"] services had those facets is irrelevant to your original comment.
If you felt that people wanting to use PNG, because GIF was closed and contrary to [the nebulous concept of] "open web ideals" has retarded progress on the web, then that might be an example? I'm struggling for an example, because I don't know of any examples, which is why I asked you because you spoke implying you know [many] examples!