Yes, that could be, though my recollection is that the opposite was more common back in the day.  I don't know what the current balance might be.

I spent a lot of time pulling in a wide array of taggers to solve this type of problem.  After speedbar I switched to putting them in semantic tags instead which had more utility than the more focused speedbar feature while still working fine in speedbar.

Eric

On Sun, Oct 10, 2021, 1:51 PM Eli Zaretskii <eliz@gnu.org> wrote:
> From: Eric Ludlam <ericludlam@gmail.com>
> Date: Sun, 10 Oct 2021 12:31:43 -0400
> Cc: Stefan Kangas <stefan@marxist.se>, 51102@debbugs.gnu.org,
>       "Eric M. Ludlam" <zappo@gnu.org>
>
> That was a very long time ago so I don't remember any specifics from then, but I can think of two reasons
> imenu is better.
>
> One, you don't need to save the file and run an external command.
>
> Two, imenu has some nice binning it does to make the tags more navigable.
>
> I don't recall specific issues with etags within speedbar though, so "robust" is probably not the right word
> here. 

Thanks.

is it possible that some files will be in a programming language that
imenu doesn't support, but etags does?