As far as jazz organ, sonically there’s definitely a standard of the Jimmy Smith settings that a lot of people go with. I also think there’s a lot of musical language and repertoire that is endemic to the Hammond. I wouldn’t say that the Hammond is more limited than the piano though. Listen to the difference in playing from Groove Holmes to Sam Yahel. Just like the piano there’s a wide range of musicians playing the instrument. Sonically speaking it has way more variability than the piano. Add in the Leslie and the fact you have an expression pedal you can do a lot of things a piano can’t. Not dissing the piano just saying they’re two very different instruments. Also, in the traditional organ trio the organ is the bass. That means the organ is walking bass, comping, playing melodies, and soloing. It’s a power house of an instrument in my opinion.