Not really. AppImages are as much secure as any other executable you run on your system. If you download it from a trusted source, like you download trusted Flatpaks or your systems repository, then they are not worse. If you say AppImages are highly insecure, because you run executable code, then you have to take that logic to any other executable format. The problem is not the format itself that makes it insecure, it’s the source.
Even with such a repo they are highly insecure by design.
Not really. AppImages are as much secure as any other executable you run on your system. If you download it from a trusted source, like you download trusted Flatpaks or your systems repository, then they are not worse. If you say AppImages are highly insecure, because you run executable code, then you have to take that logic to any other executable format. The problem is not the format itself that makes it insecure, it’s the source.
No they arent. Please read the linked post.