The Javascript community in general, did not like TypeScript. They felt their comfort zones fading away. Understandable as Assembly Language programmers did the same thing when 2nd Gen languages arrived.
Javascript folks also tend to discount Java, C## and C++ people feel TypeScript is the least problematic way to join the Javascript family.
As far as really knowing any Language is to spend around 1.5 years using it daily. Only then will they really have a feel for what it can do.
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The Javascript community in general, did not like TypeScript. They felt their comfort zones fading away. Understandable as Assembly Language programmers did the same thing when 2nd Gen languages arrived.
Javascript folks also tend to discount Java, C## and C++ people feel TypeScript is the least problematic way to join the Javascript family.
As far as really knowing any Language is to spend around 1.5 years using it daily. Only then will they really have a feel for what it can do.