Steve and Jaco, you guys are putting up some absolutely great posts in this thread. Bobby, Vintage is a lot of fun, but the large card pool is part of why the format isn't nearly as "diverse" as something like Legacy. I, and many others, find a lot to enjoy and love about Vintage. But the format's pillars are what they are because they are so much more powerful than the alternatives.
There's precedent for Old School making Chaos Orb playable via errata (speaking of which, Falling Star needs that love). No reason the community couldn't all agree to do the same for Serendib Djinn.
This is probably the main reason why Old School is a joke. Having a separate B/R list is one thing. Arbitrarily making cards work differently is another.