Tsavo Lion wrote: What should Russia do, give them money without even getting a single part in return..
of course not, & never advocated that.
However,even before or w/o the implosion, if/when relations improve, there'll be no turning back on more trade, investment & cooperation, since the alternative is economic collapse, impoverishment & deeper colonization by the West, followed by Russian armed intervention & resulting fratricide.
https://iz.ru/946661/2019-11-23/savchenko-predrekla-ischeznovenie-ukrainy-v-2023-godu
The problem is that already in better times (e.g. the 90s and the 2000s they always used delivery of critical parts for the Russian industries as a political tool and blackmail, even with so called pro Russian leadership (that was that only in name).
It is like you have a small company that produces some components needed for a larger company elsewhere And because of the behaviour of your small company (or of the regional administration where your company is located), the larger company cannot complete their products and sell them, with loss of money, credibility and problems for their customers...
Do you believe that eventually they will not do everything that is possible to replace your components in their design (even if it is very expensive and time consuming in the short and middle term)? If you are an industry you want suppliers that produce the components they need to an acceptable standard of quality at an acceptable price, and are reliable in the delivery. And if you are a customer you want to get what you paid without having to be blackmailed by the mayor of the town where the small company is.
So Russia already went over this point. They already spent a lot of money to replace or to source elsewhere most of the components previously produced in the Ukraine. Why come back now?
Yes, there are still several products and plants in the Ukraine that would be useful to Russia (not fundamental, as it was before, but merely useful).
However basing their designs or plans on such components would be stupid, since they cannot guarantee the delivery.
One of the big mistakes that Russia did in the past was finance Ukrainian industries and do not establish who owns the IP for the design.
The only use that the Ukrainian industries may have would be as "contractors" for some design work, like Boeing and Airbus do in Moscow or Rolls-Royce does in India, etc.
In that case, however it would be better and safer to establish a small office somewhere in Russia (e.g Rostov, Saratov, Crimea, or wherever). Incidentally, this is also what China is doing or trying to do, creating some design office in China that host former Antonov or ivchenko progress/motor sich employees. And Russia already welcomed many engineers and technicians from the Ukraine in the past five years.
As for the plants, if they were reliable, they could be tasked to providing some parts under order, but they are not and they have never been modernised. All that they can currently do is produce Soviet equipment, and the assembly plants are not currently capable of serial production anyway.
As I said before, if antonov finds for themselves customers in Africa or in the middle East for their products ( and they are not so stupid about trying to replace all the Russian equipment with American or French one (more expensive and that possibly could require recertification), Russia can sell them components, and even provide equipment to modernise their plants. Of course all of this behind payments of parts upfront, no loans for Ukrainians available anymore (even if Russia is at the same time providing loans to Turkey, Vietnam, and the like). They had their many opportunities to be treated like best friends and they wasted all of them.
And about An 132, 178, 140, etc being competitors to Russian products...maybe it is true, but they are at least one generation older technology and anyway Russia is not America or French in having to destroy other countries industry. Ukrainians are very good by themselves on such matter (I mean, destroying their own industry and economy).