I was thinking more at a fundamental level, I pointed out the economic changes.
For example many people think, I included, that the Bitcoin block-size should never be increased beyond 1MB.
For me stake weighted voting allocating a large part of the inflation should forever remain. Although this is being strongly challenged by the SPS.
The inflation schedule should always remain.
9 8 7 6 5 4 3 2 1 1 1 1 1 1 1% IIRC
Account balances should never be modified, obviously.
Nerd xD