It might not hold until 2036, however I do think it will hold at least until 2030. The Big10 media contract doesn't expire until 2030. The SEC media contract doesn't expire until 2034. If a team were to pay to leave the ACC before 2030, they would not be able to get a full share of media from either of those conferences. Why pay money to leave, then make the same money in a different conference instead of making more? It might be incorrect, but the reporting about the Big12 was that they have used all of the full share spots in their media contract. If a team were to move from the ACC to the Big12, the Big12 wouldn't even get a full Big12 share for them.
With all that said, If something happens it is more likely to actually happen in 2030, 2032, or 2034. It would be announced probably around 2029. You are pushing your argument too far. You said that something will happen within four years. Then when someone said that four years is unrealistic, instead of defending four years you assume their argument to mean that nothing at all will happen until after 2036.