Then comes ARK and kills STRAT with Javascript as it's 100x times more popular than C#, right?
I don't think so.
I got on the ARK train too

Both are great concepts
Also, consider ANS, LSK, Waves.
Waves is already very powerful and operational.
I think the closest competition to STRAT is WAVES atm.
And ANS can threaten all including ETH (as it's crazy Chinese, you know

)