So how long warframe(game itself) will stay alive?

[Lady_Lumia]

The answer is until the game profitable. Noone can say a fix date because the game depend on it's developers and it's playerbase. If we spend money on the game and they keeping it fresh and new then it will last long.

There are far older games which still played. 

Ascheron's Call is on my list or Tibia or Zorx " at least here we called it " and runescape is also a prime example to survive. There are also lineage, metin, kal online, silkroad etc which still exists. 

There are prime examples when a game in theory good " Wildstar " and soon it will close because of small playerbase. Also who remember the city of heroes? A cool looking game but somehow they messed up and the playerbase went downhill. 

So the answer is the adaptation, and warframe can adapt because it is a peer to peer futuristic coop shooter which genre can last long if the developers constant add new content. My bet is 15-20 year after this comment but it depends on what the new developers will doing it with the ip because the original ones going to be older and less interested in to make the game which means the new developers should have be enthuisiasts like the originals and with passion they can also improve the game but that will be different.

The real survivors the single player games because you don't need to be online all the time to play. 

[Kasamoto]

The only real Date we got is 2035 which is when all banned Accounts will pour back into the System