Make migration to new versions easier. Application packaging takes forever, says Silver. There's also the problem of "Windows rot." Windows rot is what happens to a machine after running Windows for three or four years and it gets slow and barely functions. The fix is to reinstall everything and rebuild the PC. That's a manual effort that takes too much time.
Anyone who has used Windows for any length of time has experienced this, the slow deterioration of the systems performance. It is why there is such a market for registry cleaners and tune up software. My personal favorite is Advanced Windows Care V2 Personal; it resurrected an otherwise unusable laptop for me.
Windows Rot is just so perfect.