There a physical barriers, say, conservation of energy (or for mechanical systems conservation of linear and angular momentum), non-decreasing entropy etc. If I were a physicist I could tell you a lot more of these invariants (say from quantum physics). We surely don&#x27;t know what technology the future will have, but I would bet that at least for the next 50 years there will be no fundamental breakthrough that both changes our understanding of such laws of nature and is already at this timeframe available to be implemented in technology (the last time that such a breakthrough occured was theory&#x2F;ies of relativity and quantum physics - both at the beginning of the 20th century).<p>So I might not know what the future is like, but we can surely make lots of scenarios highly unlikely.