Like old uTorrent? Riddled with security issues? You're better off with the latest version, or with security backports (these are generally FOSS apps, or vendor supported proprietary software). If an application removes features you wish to keep, and there's an interest in such in the community, a fork generally happens (with FOSS). For proprietary software, there's something like OldVersion.com or APK Mirror. Either way, when developers don't listen to their users, it is time to quit being a user.