On Mon, Nov 02, 2020 at 10:10:02PM +0100, Christopher Dimech wrote:
> I shall explain better then.  In my .texi files I customarily include commands
> from other modes or want to use some hooks from other modes (e.g. org-mode).
> So even after I load a file with the default mode, I would need to quickly
> shift to another mode temporarily, then switch back to normal-mode.

Perhaps your problem becomes different [0] if you squint at it from
another angle (space vs time): do you really want your whole buffer
to "switch mode", or are you looking after some regions "having a
different mode"?

In the second case, look, e.g. for "multiple major modes" [1]. It's
a class of problems for which need exists (e.g. Org source snippets,
but also those PHP cum HTML cum Javascript thingies.

Cheers

[0] Not necessarily better, but perhaps exciting in a different
   way?
[1] https://www.emacswiki.org/emacs/MultipleModes

 - t