Interestingly enough Frescobaldi and I think Froberger advocated equal temperament, and it was already frequently used for lute and viol literature (where the fretting makes it much easier to calculate). Werckmeister eventually gave up all his temperaments for equal too.
Sometimes I have the suspicion that we are much more interested in temperaments today compared to the past where they were simply seen as solutions to a practical problem.
That being said, I do prefer mean, or mean-sounding (e.g. Kellner or Werckmeister III) temperaments in general. But I actually can't hear the difference between equal and lots of the milder temperaments (e.g. Neidhardt III, Silbermann-sorge etc.) and would rather have equal at that point.
The Sweelinck chromatic fantasy actually doesn't use 1/4 meantone, since it requires d-sharp rather than the e-flat that strict 1/4 uses (one of the reasons why Dirksen thinks that it is meant for harpsichord, rather than organ, since retuning a harpsichord is much easier than retuning an organ). In the Renaissance, they made quite a fuss about this but today we play it on strict 1/4 meantone organs like nothing is wrong.
A piano with split sharps - now that would be something!
Alkmaar, there's actually some controversy on whether it was in equal after 1721. Ibo Ortgies thinks that it was still in 1/4 comma meantone then.