I am constantly amazed at how well the Soviets did, with lesser orders of electronic and computer aided design tech. This diversity of engines exemplifies this.(bear in mind, I am not a rocket scientist).
From the youtube they seemed to do as well as the USA in hardware, but their organisational abilities lacked quite a bit, but their science was quite good.
Now I read about the resurgence of the Stalin era corruption, oligarchs, imprisonment at whim of certain powerful people, their saber rattling over the Ukraine etc - do they not see that the USA/Europe is not their enemy. Their enemy lies to the east and if Russia did not have ~~8,000 nukes they would already be well nibbled. They do have some doomsday cobalt-60 area contamination stealthy subs.
They cannot afford to allow their weapons tech to be stolen by the East, by theft or stealth or rank copying.
I would like to see the central government release their political prisoner(s). Let Navalny go and run for office. Putin can probably win honestly if he shuts down the resurgence of the old apparatchiks - their oligarchical kleptocracy is taking the money and resources Russia needs in the warming era.
There will be a huge area where agriculture and population can expand into and with good farmers, railroads(electric of course) and industry the expansion of the Russian East to the North of China could become a huge economic power house in the next 100 years - well past the current leaders, so a new well schooled population will be needed - and only a happy people will grow for the future. The current kleptocracy makes many men and women not want to bring children into the current situation.