Comment by ajcp

The comment you are replying to is correct. The Soviet Union had massive amounts of resources and capital (both human and economic) to be able to develop and support technical innovations. The wider-Soviet bloc itself was of such a scale as to be able to completely support their own divergent technologies and innovations. The higher education systems themselves were sufficient to provide and foster the talent, even if they were overly-politicized.

Of issue, especially as time went on, was the overly-centralized nature of national resource and economic strategy and planning. Especially ESPECIALLY constraining was the dual-circuit monetary system of its economy, which literally prevented half of its "capital" to follow innovation or market forces outside of centralized allocation.

I highly recommend the book Collapse: The Fall of the Soviet Union by Vladislav Zubok