While I agree on not differing sounds much between gigs, I don’t know your experiences, I can only speak to what I experience, and what I have seen. There are many gigs where there is no FOH. There are many gigs where only vocals are run through the small PA. I perform with many different people, with many different tastes and styles. Example: this past week…Wednesday I played a duet in a small venue. It was mostly an acoustic set with an acoustic guitar and me on a 61 key controller. Everything ran through a small PA which equated to 2 monitors and a very small powered mixer. I used a nice piano in stereo with a stereo pad. Nothing elaborate, just background music…Thursday I played in a 4 piece band atop The Peabody Hotel for a huge wedding reception for several hundred people. Had FOH, huge PA, played many different styles which required many varied sounds that needed to load quickly, and randomly. Friday I played with a 3 piece, and Saturday with a different 4 piece in a medium size clubs… Both used a different PA for vocals only, and I played through an amp. Many songs were random, not in the set list. A 20 gig piano will not serve me any better than a 2 gig piano, especially through a small amp. I need one that can cut through the jumbled mix, and through much trial and error, found the highly sampled plugs don’t always work in some bands, or in some venues. If I were playing in one band, always with FOH, with strict set list, I would have no problem using the same plugs. Just my 4 cents.
BTW…like the spreadsheet idea !