In my opinion, the Russian economy will not collapse due to the imposition of Western sanctions.
However, Russia is threatened with the "archaization" of the economy.
At the same time, cars, trains, planes, and trains were produced in the USSR. All this functioned without the use of modern electronics. The Russians have the opportunity to gradually restore their heavy industry and even machine tool building. The economy will function.
However, in the field of microelectronics and modern technologies, Russia are hopelessly behind the countries of the Western world.
In the Soviet Union at that time there was a very modern production of products and equipment, perhaps due to the fact that it was aimed at the domestic market, it was so specific. I really agree with you that Russia will no longer catch up with the world of microprocessor engineering, and this is sad.