In general the 3900X is really nice, and if I did it over again, would probably do that over the 3950X.. About my only complaint is 32gb ram modules aren't available in 3000+ frequencies, so 64gb is about the max prudent amount you'll get in AM4.

It depends on what you're shoving into docker, or how much you're building in golang...

As far as gaming, all the Ryzen 3000 series perform within a couple percent of any Intel CPU close to the price point... The 10900X might do another 3-5% better for gaming, but your electricty use will nearly double for that very minor increase, not worth it imo.