This site is not about speculation and reasoning. It is about "expert answers".
Sometimes those expert answers can be based off of speculation and reasoning, though.
Generally, answers that cite source materials (quotations, author interviews, etc.) tend to do much better than answers that are pure speculation, but there are some questions that can't be answered without speculation and reasoning, and some of those receive answers that are very good, and are well-received.
I don't know much about The Matrix series, but I am guessing that your answer is being downvoted not because it is speculative, but because it is presented as fact. You phrase your answer very definitively ("Yes, time will pass and year 2000 will be reached.", and "They will deal with the y2k bug on the Matrix fake world.", for example), but don't back it up with anything beyond speculation.
Compare that to the other answer, which is also speculative, but is phrased in a way that clearly indicates that it is speculation and reasoning. It hasn't received any upvotes, but it also hasn't been downvoted.