Comment 4 for bug 1875522

Just to interject, people rightfully believe do-release-upgrade (without -d) will upgrade them to Focal, because that's what the Release Notes say.

https://wiki.ubuntu.com/FocalFossa/ReleaseNotes#Upgrading_from_Ubuntu_18.04_LTS_or_19.10

IMHO, It's either released or it's not. I like @wxl comment of waiting to prompt but allowing upgrades.