2016 was the year they won the consecutive CS:GO Majors, the biggest events they'll ever win. That is the only crowning accolade noticeable throughout their streak, but over the course of two years they were not at the top, they were around it -- sometimes topping the scene -- sometimes not.
There is a reason NiP/fnatic are credited with having "eras" and that is because they were so indomitable, they changed CS:GO history. Being the number one team in a sloppy fashion for two years is not total, era-defining dominance, they were just the best team in the world overrated by fans; which is fine in theory, but not when it's being spammed widespread.
Personally I agree that 2017 showed a more defined SK and they were well on their way to having an era by winning six tournaments in a row, but they lost out at the CS:GO Majors and flopped during the end of the year to FaZe clan. Thankfully both Fer and Cold were on point to stop NiKo and co. before they completely took them.
The top four of 2017 were Cold, NiKo, Fer and then rain... Two from FaZe, two from SK. Whereas 2016 showed FalleN at the second spot and Cold at the first spot.
In my opinion 2016 was the Brazilians most dominant period because of the back-to-back Major wins, but SK looked more refined in 2017. IT doesn't mean they need to be overrated by fans to have accrued an "era", because there was none...