This is just nonsense. There are plenty of hyped startups/products who went nowhere. Unless you understand how to market and execute you're going nowhere. MongoDB has demonstrated they are seriously good at it and given how well 3.0 has been received (write lock gone, extremely fast performance, Call Me Maybe test fixed) they have a lot of momentum.

> They are working on it, but they are being very conservative

Conservative being the operative word. You would think sometime in the last 20 years they would've tackled it.

Even if so, you're overestimating RethinkDB's mindshare outside of the HN echo chamber (and I say that even though I'd prefer RethinkDB myself).

If mindshare equals to developers knowing "this product exists", thinking "this product is good, I should use it", or deploying it, then Mongo wins by a factor of 4 or 5.

There's also the mindshare that Mongo has in companies building integrations for it, third party products etc.

And of course millions of CS/IT students today know about Mongo and will use it in this project or another, whereas very few know about RethinkDB. Those will be "tomorrow's market share".