It looks like systems that were originally colonized but are now controlled by Thargoids are excluded from the Populated systems nightly dump by virtue of having 0 population. Which is technically correct...
However, this is unintuitive since these systems still contain traces of human civilization - stations, settlements, economy type other than None (probably the easiest way to identify them), and often a unique name. It is also confusing when a system suddenly disappears (I run a tool based on nightlies and one of my users reported their frustration).
There are currently less than 100 such systems so the size impact would be negligible.
It looks like systems that were originally colonized but are now controlled by Thargoids are excluded from the Populated systems nightly dump by virtue of having 0 population. Which is technically correct...
However, this is unintuitive since these systems still contain traces of human civilization - stations, settlements, economy type other than None (probably the easiest way to identify them), and often a unique name. It is also confusing when a system suddenly disappears (I run a tool based on nightlies and one of my users reported their frustration).
There are currently less than 100 such systems so the size impact would be negligible.