Comment 1 for bug 1812366

Just wanted to reinforce that there is a high probability that all Ubuntu LTS servers will start failing to renew Let's Encrypt certificates as the minimum version for certbot should be 0.28 to fix TLS-SNI-01 problems.
https://community.letsencrypt.org/t/how-to-stop-using-tls-sni-01-with-certbot/83210

I am sure I am not the only one using only Let's Encrypt for multiple sites and servers. Would be really cool if you would backport the package from disco to cosmic and bionic and prevent the TLS apocalypse. :)