I know what building an MMO is like, having worked on one 10 years ago that was already 10 years old and still exists today (small audience though).
Building something like these people are talking about requires more $ than a Marvel superhero movie to get anywhere. We could manage about 100 simultaneous players visible to each other in a reasonable time but no more; the internet is not fast enough to manage more than that many "people" with anything resembling real behavior, even then its hard to maintain the illusion of fluidity with the random latency of so many streams using prediction. Supporting millions of users like these people claim is fantasy even if you only saw a handful. Maintaining state in a single world at that volume is impossible with real people (you can fake a lot of "AI" characters but not actual players). There is reason why most MMO and similar games limit the number of players, or like Eve throttle the game time and slow everything down if too many ships appear in the same place (not possible in a "on ground" sort of world).
Also building something of this magnitude and even getting it to do even a small subset of what they want requires people with lots of experience, as this is highly complex and specialized programming, not to mention an enormous amount of art creation, lighting, audio, story and other content, unless you go the No Man's Sky route and generate everything. But they don't support huge numbers of"local" players either.
Building something like these people are talking about requires more $ than a Marvel superhero movie to get anywhere. We could manage about 100 simultaneous players visible to each other in a reasonable time but no more; the internet is not fast enough to manage more than that many "people" with anything resembling real behavior, even then its hard to maintain the illusion of fluidity with the random latency of so many streams using prediction. Supporting millions of users like these people claim is fantasy even if you only saw a handful. Maintaining state in a single world at that volume is impossible with real people (you can fake a lot of "AI" characters but not actual players). There is reason why most MMO and similar games limit the number of players, or like Eve throttle the game time and slow everything down if too many ships appear in the same place (not possible in a "on ground" sort of world).
Also building something of this magnitude and even getting it to do even a small subset of what they want requires people with lots of experience, as this is highly complex and specialized programming, not to mention an enormous amount of art creation, lighting, audio, story and other content, unless you go the No Man's Sky route and generate everything. But they don't support huge numbers of"local" players either.