It's really unfortunate that there are no commercial incentives to provide strict sandboxing for outdated versions of applications, rather than only allowing th

It's really unfortunate that there are no commercial incentives to provide strict sandboxing for outdated versions of applications, rather than only allowing the latest version to be installed. There's a strong public good in preventing versions of applications with known vulnerabilities from accessing the network (or perhapse restricted to an (possibly empty) allowlist of domains). However, the inability to save old installers and run old applications in some cases leads to lost functionality, which is sometimes effectively lost data. I got my wife to start using a password manager, but I really should have given her some guidance. She picked one that was popular in her native language. I also encouraged her to upgrade iOS on her phone. We backed up her phone and upgraded, but the new iOS version would drain her fully charged phone in an hour or so. So, we restored iOS from backup. Unfortunately, her password manager had been discontinued, and iOS backups just contain effectively remote symlinks to installed apps rather than containing the actual binaries. The discontinued password manager then showed up as something like a stub displaying an error message that the app could not be installed. Luckily, I was able to get into the backup and determine the password manager used an unencrypted sqlite DB with English column names and I was able to give my wife her passwords back. I would have much preferred a warning that the backed-up version was no longer supported, and be given 3 options: (1) install the last released version in a locked-down sandbox (2) install the backed-up version in a locked-down sandox or (3) uninstall the app.