Improving .deb

Second this: I have a couple machines that have seen every release since Lenny (5.0 to 9.0) without any reinstall and many that have been around since Stretch. The fact that Debian makes this painless is a *huge* win seeing reinstalling is a lot more work and would probably require a new machine to be swapped in. Every two years I just upgrade every machine and it typically takes less than an hour per machine. If I had to reinstall, I probably wouldn't upgrade anything which is obviously wrong.