The great thing about extensions is that they survive upgrades (mostly).
The bad thing about extensions is that if you want to do something very quick and simple (like tweak a template), they are complicated.
So the community of small simple tweaks we used to have has disappeared.
I would like to propose the following (AutoMod) extension:
1. You can create simple INSERT/REPLACE/DELETE mods (like AutoMod in earlier versions).
2. You register the MOD with this new extension and it applies it like AutoMod.
3. Whenever the file has changed It checks that the mod is still applied, and if not it reapplies it (assuming that it still can).
This would enable people to come up with those easy small tweaks again.
You may have noted that my proposal is that this would only do simple code / template tweaks and does not include e.g. database changes. This is deliberate, as I would suggest that any MODS that require integration with permissions or database etc. are best delivered using a full grown extension.
What do people think of this idea?