Hi Johnmar 78,
You may not realize that you may be igniting fuses that may lead to a flame war ... of which Chris is apparently quite fond of
. I will say simply that tempo rubato
is IMO best thought of at the tempo level
not the rhythm level
as the name implies. If you can picture how a conductor would manage to gesture rubato tempos (ritardando, accelerando, etc.) but the instrumentalist would still play all the right rhythms, I think this is the best understanding of tempo rubato
. It is, as you say, most certainly a matter of taste - and one of strong opinions too.