Re: vc-set-mode-line-busy-indicator

[Richard Stallman]

    I does, I've had a bad personal experience with that: after adding
    patches at the end of mail messages with  using M-x insert-buffer RET 
*vc-diff* RET 
    I got a comment: "Please fix your mailer not to insert crap at the end of 
messages"

It sounds like you were dealing with someone rude.

    There's no reason to subject emacs users to such abuse for absolutely
    zero benefit.

I've explained elsewhere the benefit.