To judge by his keyboard fugues, Reicha had a spark of genius, no doubt. Who else in 1800 Paris or Vienna had written an entire piece in 5/8 meter? And on the existential side, who else at that time would would even have thought of writing (much less pulling off) a fugue where the subject has two fingers alternating rapidly on a single note? Or on the reception history side, who else would have written an entirely new fugue based on Scarlatti's old Cat's Fugue subject? (Yes, Czerny wrote a very nice Scarlatti-style sonata, but that was 40-odd years later.)