My 'conductor' was certainly 'conductor' in the post-Berlioz/Spohr/Weber/Wagner/Mahler sense - which for music up to and including Beethoven is something which I find quite audibly less and less interesting. Compare Cristofori's Beethoven piano concertos with JEG's...
I think it's probably more the case that conductorless performances have become
more interesting though - the Collegium Aureum was playing repertoire up to Beethoven without a conductor in the 1970s and the result was in comparison with more modern, I mean more HIP, you know what I mean, more
recent performances, a bit anonymous.