One of the most beautiful improvised Jazz pieces (https://en.wikipedia.org/wiki/The_K%C3%B6ln_Concert) was largely produced due to having to play within the limitations of the piano, which was mistakenly set up and was too late to replace.
The first time I heard this recording I basically got stuck in a loop of listening to it on repeat for a couple of weeks. I just couldn’t comprehend that this was improvised.
I'm not sure this is a useful example.
Jarrett recorded dozens of other solo piano improvisations on pianos that posed no issues for his performance, and he himself thought more highly of some of them (e.g. Vienna) than Köln.
So unless you're making the case the the actual popularity of the Köln concert was somehow a function of the less than ideal instrument, I don't see what this shows.
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