I understand that gas turbines can produce that kind of power, in fact I used to work on some pretty large turbines and turbo generators in the 500-1000MW range

I understand that gas turbines can produce that kind of power, in fact I used to work on some pretty large turbines and turbo generators in the 500-1000MW range. However they aren't used as backup generators where they have to be online in a minute. These are the types of generators I was referring to, https://powergen.gepower.com/products/reciprocating-engines/waukesha-vhp.html https://powergen.gepower.com/products/reciprocating-engines/...