even before Haydn, this is a contemporary of Händel (Handel), William Babell:
this is just typical keyboard music of that time
I’ve been able to use hidden tuplets, weird time signatures etc. to reproduce some of Nancarrow’s polytempo studies. This one has two tempos, h = 84 and h = 140, in a 3:5 relationship, with an 8-staff piano. And it plays back perfectly as well - it amazes me that Dorico can handle stuff like this in stride.
