[skewbone]

The PE6000 is closer to a GE LM6000 rather than an LM2500. https://www.gevernova.com/gas-power/products/gas-turbines/lm...

The LM6000 and its variants have been in operation since probably the 1980s. I can ask around at work. I used to develop the code for the LM6000.

You're spot on that people use them for peaking, but it's a big mix. Peaking, mid-merit, and sometimes base load. There are low emissions versions as well, that keep NOx to a handful of ppm without using extra water.