Semi off-topic, but anyway, I have an supportive argument for you: APKs are signed anyway, the signature is embedded in the package, regardless of whether it's

Semi off-topic, but anyway, I have an supportive argument for you: APKs are signed anyway, the signature is embedded in the package, regardless of whether it's in the app store of not, it the signature has changed, you cannot use a new version to replace the previous version without manual reinstallation, it's an effectively safeguard against phishing. But only the readers of Hacker News can recognize it. I think it's one of the most powerful argument for a walled garden. Not that I support it, but I acknowledge it's still a powerful argument.