Re: Emacs manual mentioning thumbs mode but not tumme

[Richard Stallman]

    The point for retaining thumbs is that one can't please everybody with
    one approach.  From a user's perspective I think offering choice
    outstrips every other disadvantage concerning maintainability,
    consistency, etc.

Many users find that "more choice" adds up to "complexity" and
"uncertainty".  It is therefore usually much better to provide just
one feature for a certain job than to provide two.