@smortex I used it in prod for a project for a couple years because the plugins/modules for it provide some really nice functionality sometimes... we had a site that provided services on subdomains, but it was *.*.foo.com which a wildcard can't do, so it has to generate a certificate on-demand when the domain is accessed if it doesn't have one yet. I was able to use a module (certmagic) to let me store the certs on an S3 bucket so every server could have access to the same certificates

So in that respect it works pretty well, but their HTTP/3 support sucks and they have bugs like the metrics causing performance issues that have existed for years and nobody's fixed it...