Is Jhin top viable?

Short answer : non.

Long answer : Jhin is an ADC whom escape is non existent until he has at least 2 items (for the bonus MS on his crits). Any competent toplaner and jungler will abuse this against you.

Probably not, he'd get eaten alive by any bruiser with mobility and would be a gank magnet for the jungler in a solo lane that long.

https://www.youtube.com/watch?v=2ytguuusgms

Maybe I think he fits most of lanes BUT the negatives is that he has no escapes and not hard CC.

I feel like many will say no.. but then they'll do it in korea or the lcs.. and then you'll be called troll if you don't do it XD