If “18.04” is fine means “we test installs/updates on 18.04 and don’t release code known not to work on that or issue bugfixes” and no other version/distro has this “guarantee”, that’s perfectly fine: if this stays as-is, I will update to 18.04 before 16.04 goes out of support.
I just want some clarity here. If 20.04 (or any other LTS with a longer lifespan than Ubuntu 16.04, such as CentOS 8) is supported, I would prefer to update to that to reduce my maintenance effort, but I will not run anything other than 18.04 if I don’t have the same “guarantee” about it.
I’m not an enterprise and I’m using an OSS project, so my policy might seem overkill to you, but I don’t think I’m making any outrageous demand; basically I’m asking the documentation to say:
We test installations and updates of each release on the following distros: … Systems running 32-bit kernels and/or kernel versions prior to 3.10+ are known to not work
I’m explicitly not asking for any other distro/version to be supported. I’m sure tests about installation/updates are being done- I just want to know what’s being tested.