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One thing I learned the hard way is that if you are on the right track, your competitors are probably barking up the same tree and are further along than you would think baes on what is public.

For instance there was a period of many years where both Google and Bing image search were embarrassingly bad and I was able to build something far better for a certain range of queries.

It took me a year to build out my system but in that year, Bing and Google both improved dramatically, so my demo comparing results with them was no longer impressive at all.

Technology has some phase changes, where it suddenly changes from "doing X is extremely hard" to "hey, X is actually very easy to do!" without any ado, and no obvious reasons.

There are too many histories where after a long time of nothing happening, everybody suddenly starts working on the same problem, without any kind of coordination.

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