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Alternatives or not, I think it’d be very beneficial to document concept of operation that you want. That way you can either take pieces of these conops and tell lemmy devs what you want, or if you have your own project this will be its conops and you can guide developers towards features you need.
To be fair, there’s only been 24 year’s of 21 century. Most things you gave listed happened at the end of the 20th century. But also the question is somewhat self negating - we won’t know what’s the greatest invention until we see it working great, but it takes much more than 24 years to take an invention from concept to consumption. For example computational biology is kicking off. Computer aided dna generation started in the past 24 years. But it’s so new few people think about it. Just like no one thought of internet as the greatest invention in the 70s… it was just too new