That depends on whether the fix that Peggy deploys for one client also fixes the same problem for the other 399. In other words: It depends. There's no genera

That depends on whether the fix that Peggy deploys for one client also fixes the same problem for the other 399. In other words: It depends. There's no general answer, because deciding where to draw the abstraction barrier between you and your vendors is an unsolved, difficult, and evolving problem.