Support status question

What happens when the packages supported till 2019 expire ?

ubuntu-support-status
Support status summary of '7':

You have 1618 packages (73.6%) supported until April 2021 (5y)
You have 8 packages (0.4%) supported until March 2022 (5y)
You have 473 packages (21.5%) supported until April 2019 (3y)

You have 7 packages (0.3%) that can not/no-longer be downloaded
You have 91 packages (4.1%) that are unsupported

It could be inaccurate information, depending on what version your running.

https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1574670

Thanks.

It says the bug occurs with Xenial, but not which versions.

Ubuntu-Mate 16.04.2 LTS xenial