`ExtensionImages` (second bullet point) seems it would be essentially the same as having a regular Portable Service [1]. I get they needed the field for the sys

`ExtensionImages` (second bullet point) seems it would be essentially the same as having a regular Portable Service [1]. I get they needed the field for the system-level sysext service, so they just made it available to every other unit too. But is there any reason to use `ExtensionImages` instead of making a Portable Service? Edit: I guess if you have multiple services from multiple vendors that nevertheless agree to some common base image, it makes sense for those services to use `ExtensionImages`. Eg multiple services that all require a libglib base image. A Portable Service can expose multiple services from a single disk image, but that's the point - the vendors have to build a single disk image with their services. [1]: https://github.com/systemd/systemd/blob/main/docs/PORTABLE_SERVICES.md https://github.com/systemd/systemd/blob/main/docs/PORTABLE_S...