I'm always a bit bothered by them saying they are the "only" web server that can do this. First you can also just configure it in a way where it will not use HTTPS (e.g. if you provide an IP:port instead of a hostname). And if you do require specific configuration to enable HTTPS and automatically get certificates via ACME, then lots of other web servers can do this too. Even my own web server can do it: https://github.com/pfirsich/htcpp (see https://github.com/pfirsich/htcpp/blob/main/configs/acme.jom... for an admittedly much more complicated config).