In response to a comment by Thanuir left in response to my post " Old School vs. New School: Have we lost our way? ".
There are differences in the _mechanics_ of resource management between Old School and New School D&D, true. 4E lends itself to heroic combat where guns are blazing and the PCs are in a constant firestorm. OD&D is more sudden, deadly, and possibly even mysterious. I guess some might consider this a trade off 4E carries due to "The Tyranny of Balance", a phrase Donny the DM coined.
Now, every campaign I've ever played in had its own houserules. So, allow me to ask this question - how many houserules, or what kinds of houserules, would be needed to make OD&D more like 4E?
How about to make 4E more like OD&D?
As a molecular biologist, I'm intimately familiar with the notion of subtle differences between two things (genes in this case) that have profound effects on observable outcomes (phenotypes). These differences can be quantified - makes me wonder if we could really put our finger down on the (small number of) characteristics that separate the OD&D Grognard tribe from the New School 4'Teen tribe. If so, what would those be? How many aspects of the rules would have to be changed?
I guess what I'm asking here is "What houserules would need to be put in place to bring OD&D and 4E and PF players together at the same table, and have everyone be happy?"
Is that even possible?
If so, what would that game look like?