I would wager the vast majority of Nginx "installs" are running in a container now a days.
The distro doesnt matter and few are provisioning an instance of anything, that's some container orchestration job.
Last week trying to coax nginx to be able to set a CSP nonce in a web apps index.html which apparently meant I would need to custom build Nginx or a custom build a container with a custom built Nginx to install a plug-in to do it. This type of stuff adds up and having a bunch of stuff hidden in Nginx Plus doesn't help either.
I think Nginx is a great piece of software its just that people don't need all its offerings, they just want to host some tiny js and proxy to an API and things like caddy were built for that. The limited throughput doesnt matter when CloudFlare or Cloud front cache most of the things it is serving anyway.