Re: position on changing defaults?

[Richard Stallman]

    The argument against using pre-command-hook and post-command-hook is 
    efficiency

That is one argument, but I posted other arguments.

Also note that the de-shifting mechanism is more efficient because it
would only run for shift keys, whereas pre-command-hook and
post-command-hook run for every command.

However, I don't like the de-shifting approach because that imposes a
meaning on all shift commands that cannot be overridden by rebinding
them.  I don't think we should do that, regardless of the precise
mechanism.