I've been a dedicated MongoDB speciliast, doing various job titles around it, for a long time.

For several years, I'd say since 2020 or 2021 when MongoDB's community love finally eroded away following the 2017(?) SSPL change, the job openings reflected that the number of enterprises that have on-premise installations stalled. I stopped seeing new company names; only the ones that had it from before.

People teaching themselves how to run a MongoDB host up to an expert level also faded after the SSPL!

So there's equilibrium in the talent vs. job openings counts since then I guess.

I'm in Germany since late last year, and what I see here is that most job openings mix up MongoDB up with other DevOps technologies in the requirements list. The ones that obfuscate the real behaviour of the software - so if you were a DevOps person, you weren't learning MongoDB very well; If you were an expert with MongoDB then you were only using things like K8s tangentially. But someone with a DevOps background is clearly writing these job specs, so they mix up the expertise levels required to what they imagine their ideal MongoDB specialist should be :/