SQL Server Linux Ubuntu

Hi,

Can I ask why the official documentation for installing SQL Server for Linux on Ubuntu, specifically specifies version 16.04, when users seems to have had no issues with 18.04 (For example):

https://social.msdn.microsoft.com/Forums/sqlserver/en-US/92235bab-86a8-4aa5-ba78-2837656d99de/is-there-any-way-to-install-the-product-on-ubuntu-1810?forum=sqlsetupandupgrade

https://docs.microsoft.com/en-us/sql/linux/quickstart-install-connect-ubuntu?view=sql-server-ver15

Is there anything specific which is holding Microsoft back from officially supporting 18.04?

Thanks