@meierzwo, adding to what @Pils stated above, Linux is a choice thing and not something Gizmo held us back on. It's a business decision. For the aircraft and plugins you mentioned, it is not likely we will begin supporting Linux.
Regarding the Gizmo list, and stated by @Pils, the updated installers do inform you what you own that still require Gizmo at the time of install. It is a continually curated list that will always fetch the latest information in that moment. That said, you will not be shown this list if Gizmo is not currently installed on your computer at all. The installer is programmed to assume you don't need to see that list if you're not currently running a product that requires it.