Except in critical technology such as semiconductors and advanced CNC machine tools. Lucky for Russia, they can now import from China!
Not really, this war demonstrated that Russia's conventional forces is actually not that good!
I think the semiconductors using in Russian army are Russian designed and produced by Mikron, at least in the SU35 and SU57 if you check the processor is a 90nm designed of some Moscow institute and produced by Mikron.
What Russia is lacking is lithography but lithography for 90 nm is not so difficult, they have the base tecnology development needed to create a lithographic machine of 90nm if it would be absolutely needed. I am talking about particle accelerators, synchroton and that staff
About CNC it could be, but the point is. No country it is independent in all its machinery and technology (maybe China is). But with an independent MIC I refer that there are no parts that are manufactured in other countries.
The difference is the next. If your military complex need to import a piece of a tank, you need a constant supply of that piece. This means a constant supply line that is possible to attack by an enemy.
If your MIC need some foreign tooling, of course you need supply of them, but its not a constant supply. Think of how many microprocessors you can manufacture with just one lithographic machine.
A tooling machine will contribute to hundred, thousands or ten of thousands pieces. You have more time to find machines in the black market, you dont have such a clear supply line, it is easier to compensate that carency.
About what this war has demonstrated or not.
Do you think that if the EU would have invade this Ukraine, and Ukraine would have been supported by Russia and China they would have been more successful?
I am from the EU and my personal assessment is that Ukraine would have kick our asses so hard that war would have been over in weeks.
Ukraine started the war with one of the densest anti aircraft defenses in the world. It inherited tremendous amount of missiles, launchers from the Soviet union because it was the "front country". It inherited the technology. And with US support it integrated all of it in a integrted air defence.
Ukraine has total support from US/EU satellite, almost limitless intel
Also Ukrainain (and soviet cities in general) are designed as fortresses.
Ukraine also had the largest army of Europe, the second biggest number of tanks, enormous amounts of manpads and antitanks from US and NATO in general
And what is almost as important important as the hardware. A radicalised population, total control of the news within the country, possibility of almost limitless mobilisation.
I am very careful to judge Russian performance based in this war. Performance is based in the skills of your enemy.
And the enemy of Russia in this war is very very skilled.
One have to be careful in extrapolate conclusions from it.
Compare this war with Afganistan or Iraq. The available tecnology they have, the forced massed agaisnt them, the lack of support from nobody, lack of any kind of intel, lack of even desire of fighting (in the case of Iraq there were full armies surrounding).
Now, delete the US from those wars and let the European countries fight them. Would they have won? even against enemies far less powerful than Ukraine ?