Do you have any evidence to support this claim?

The availability of economically competitive alternatives to fossil fuels (like cheap solar + batteries) is a very recent development.

You are moving goal posts.

We are talking about technology as such not necessarily economically competitive.

I wouldn't consider the technology of solar engineering mentioned in your link economically competitive either.

Doable but not cheap.

The same is true for the technology to prevent climate change. It exists but it was expensive.

Interestingly, it's still expensive now because even though the basic technology is cheaper, the timeframe is much shorter, so we have to achieve more in less time than if we had started earlier.

as always, just follow the money… once effects of climate change become more expensive than solving the problem, the problem will be solved :)

Once the effects of climate change become too expensive or inconvenient for the ruling class you mean, which might be never since they are really good at shielding themselves from consequences.

I wholeheartedly agree though am questioning whether shielding will actually work if effects of climate change become dire… not just for the ruling class personally but in the way that made them and keeps them a ruling class.

Many are old enough to die before the severe effects could hit them.