7zip is to my knowledge only available for windows.
Why should we allow a format that is not available for all platforms?
Zip has native support without the need to install additional software on most operating systems.
Also, the internal format for starmade blueprints is zip, so a downloaded zip compressed blueprint can be renamed to sment to make it a blueprint.
Or for example rename a .sment file to zip and extract it to put it directly in your catalog without needing to through the import system.
And for the effort to "zip" it instead of "7z" it, there is no real difference:
View attachment 22468
Same for all dialogs for 7zip,
its only a dropdown change to make it a zip and
not lock out all non-windows users.
- Andy