The Gilded Age was startlingly similar to our own era - which is basically cyberpunk without the readily available prosthetics, pity, I could use some decent cybereyes - in the rise of powerful corporations that monopolised trade and production (and owned newspapers and thus controlled mass media), were extremely influential in government (with most politicians in their pockets one way or another), and owned millions of workers like serfs. Oh, and of course it was the heyday of colonialism, with the scramble for Africa in full swing. We do a bit less of that now, but not much.
We’re in a new Gilded Age now and I fear we will not manage to curb it with the rise of unions and antitrust law as they did back then. I’m sadly not surprised that many people reading or gaming in steampunk don’t want to be reminded of their own lives and political reality.