Allowing multiple versions of the same library to coexist has always been a security problem. With multiple versions (and pinning) available, developers stop d

Allowing multiple versions of the same library to coexist has always been a security problem. With multiple versions (and pinning) available, developers stop doing the required work to keep forward/backward compatibility. As the number of versions piles up, the amount of work required to patch vulnerabilities and backport those patches becomes unbearable. And distributions care about security.