I do wonder if they considered any alternatives to requiring DNS challenges. I'd like to know the reasoning. I have a domain set up where every subdomain not o

I do wonder if they considered any alternatives to requiring DNS challenges. I'd like to know the reasoning. I have a domain set up where every subdomain not otherwise specified gives a CNAME to one of the subdomains. (gandi lets me do it, don't know if it's standard) Certbot could easily serve the response to any challenge issued to <random number>.example.com as many times as it takes to be sure.