Nothing inherently wrong with steam, just as there's nothing inherently wrong with spinning rust hard disks or punch cards.

We are at the end of the tech curve for steam, we have pushed it hard and made some super impressive technology, but it's not advancing anymore. Supercritical CO2 might have some advantages, or other fluids.

We have zero-carbon tech that uses non-steam principles, and is currently on a tech curve that's getting cheaper than any thermodynamic cycle. We have storage tech now which is an even bigger revolution for the grid than cheap solar, because a huge limitation of the grid has always been the inability to store and buffer energy.

I still have pinning rust disks, but only because they are cheap. If SSDs were cheaper, then we would see a massive switch.

(BTW denigrating steam also denigrates all fossil fuel electricity sources, because they use the same mechanism, except for some natural gas turbines)