They had a lot of excellent scientists.
Fun fact, the math behind radar stealth was developed by a Russian scientists and was ignored in URSS because it had a shit title. US delayed translating it because they didn’t undersrand the title. After a few years somebody at lockeed marting found it and realized what it meant. I think F-117 was developed based on that.
Probably its just a snapshot at some point, with maybe downloading new stuff when its published. At least thisbis how i’d do it.
Can confirm, I am syncer