It probably won't, but it'll evolve in a different direction, and knowledge from abroad (and from inside Russia) won't be distributed as much as before.
Indeed, I believe that is going to happen this way.
But in the same time, it's a strong signal to avoid to do software related business in Russia. The blocking works both ways. Just look at what happened in China, they do have their own tools and networks but almost nobody is outsourcing work to China compared to other countries.