I believe the question you are referring to is asking what general level of experience TypeScript developers have. I too was a bit taken aback when I saw that. I had to reread the question. They should have done a better job making that clear in the chart for people just skimming the data.
https://2019.stateofjs.com/javascript-flavors/#javascript_fl...
Re:State of JavaScript 2019
by jermaustin1 on Thursday December 19, 2019 @12:00PM
(#21836699)
I completely missed that last sentence I guess.
Don't worry I added it later on to clarify.
Either they are padding themselves on an anonymous survey for that sweet sweet ego validation or they have gaslighted their own experiences. Makes me pretty incredulous at the quality of this sample.
It could also be some prick who converts 80 hour weeks into years of experience x2.
EDIT - They don't. They have 10+ years using JavaScript
TypeScript was released in 2012, sure there are early adopters and beta users, but I seriously doubt that nearly 22% of the people using TypeScript prior to it being released.