How many active BTC-developers are there at the moment? Probably a few dozen at most?
According to
https://bitcoindevlist.com/ there are
67 Bitcoin developers listed there.
According to Bitcoin's Github, there are 947+ contributors.
https://github.com/bitcoin/bitcoinThere are enough developers for Bitcoin decentralized projects and they are world class developers.
(rhetorical question)
but how many have the privilege to merge those contributors efforts, look at who moderates the path of the roadmap, look at also who force-merges their own code in, even when certain things are controversial