Is Critical Infrastructure Vulnerability a Far-Fetched Danger?

Question

Information Security

I watched a video from the Goblin with one interesting guy, a former intelligence officer:
Andrey Bezrukov about intelligence
At the end, he touched on the topic of "cyber warfare" (see starting from 1:07:30 ).
I want to know the opinion of experienced you (those who are "in the know") about the threats that the guest is talking about.
I am far from this, and it seems to me that "turning off Moscow" or "turning off the plant" is a far-fetched threat, and the technical possibility of this is weak.
Another thing is that the uncle founded a firm and is doing (or is going to) business on this.
I admit that the threat is far-fetched, and the comrade uses his authority as a person who "knows secrets", inflates fear and creates a demand for technologies that are like an umbrella to a fish.
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PS About the vulnerability of the "smart home" is more realistic, in my opinion.
But the "smart home security" business is not soon, especially in the provinces.
First, people must equip their homes, specifically entrust a lot of things to "smart technology",
and then a villain-blackmailer-extortionist or just a psycho should already appear.

Answer 1

One plant can be turned off. The region is already more difficult, but also possible. The country in principle is also possible.

Answer 2

The truth, as always, is somewhere in the middle. The uncle, most likely, is promoting his business, but nevertheless, the issues that he raises are real.
Or do you think FZ-187 was taken from the ceiling like that? Well, here's a little more regulation on the topic:
FSTEC Order No. 239 (as amended on February 20, 2020) "On Approval of the Requirements for Ensuring the Security of Significant Objects of the Critical Information Infrastructure of the Russian Federation" (contains the Requirements themselves)
Decree of the Government of the Russian Federation No. 127 dated 8 February 2018 "On approval of the rules for categorizing objects of critical information infrastructure"
Decree of the Government of the Russian Federation No. 2458 of December 31, 2020 "On Amendments to the Annex to Decree of the Russian Federation of July 17, 2015 No. 719" (which contains a list of signs that products are Russian)
FSTEC Information Letter of April 17, 2020 No. 240 "On the issues of providing lists of critical information infrastructure objects subject to categorization"
Now everyone is frozen in anticipation of the signing of the Decree on the approval of the deadlines for the transition of CII subjects to domestic software and hardware. The decree has been hanging in the "signed" state for a long time, and as soon as it is signed, the subjects of the KII will have to line up and go in oblique rows to demolish Windows :)
The danger, unfortunately, is very real. WannaCry, NotPetya and other Misha showed that we have a lot of morons and students in the administration...