Established energy companies invest in new technologies, if there is a return on the investment.
Established companies of all kinds invest into incremental improvements to their core business infrastructure. Investing in anything "disruptive" – i.e. that obviates any relevant amount of current equipment, personnel etc – is either blocked or sabotaged by internal politics, as the bosses responsible for said kit and bods will fight to keep their departments relevant.
IBM saw the PC revolution coming a mile away, yet it couldn't for the life of it avoid crippling OS/2. Before that, Edison passed on the chance of adopting AC technology for his electric company because it would disrupt its intended business case of selling generators wholesale. Before that, Western Union snubbed the telephone because it didn't fit in the paper-centric workflow of telegraph machines...
The list goes on and on.
The smear tactics are used against "carbon" based energy, today. This is against everyone's interest.
You would think so, but in fact no.
All those fancy new "renewable" wind and solar plants people gush about – what do you think powers the grid when the wind is not blowing or the Sun isn't shining?
Tip: it starts with "fossil fuel" and ends with "plants".
The current "renewables" craze is doing wonders for the fossil fuel market, as every "clean" plant needs a couple thermoelectric counterparts to take up from where they let us down.
yet politicians are killing coal plants
Germany is deploying new coal plants like there's no tomorrow. I have yet to learn of any decommissioning of comparable size anywhere in the world...
[clean natural gas]
Natural gas is "clean" only in the sense that it releases less soot and sulfur than other fossil fuels, but it still produces large amounts of carbon gasses. It also got terrific price volatility, so you might want to think again about basing much of an economy on it.
I know how everyone loves electric & hybrid cars, but those are really dirty...
And anyway, you'll need something to power all those batteries.
I still stand by my previous point: incumbent energy companies will slow down adoption of technologies that pose a threat to their current businesses, just like companies in any other market. The fact they'll promote those technologies that secure and / or complement their investments doesn't change that.