The grimmest Slaf projections probably won’t happen. Still it shouldn’t just be skittles and rainbows posted in this thread. A little pushback is warranted.
This isn't really "pushback" against homer fans in a meaningful sense though. You've basically just decided independently that he is currently "following the Dainus Zubrus mold", and that unless a 19-year-old with 40 NHL GP meets a standard (playing like last night's game or better on a regular basis over 82 games steadily with only periodic variance in performance) that only a pretty small group of upper-tier forwards in their primes can manage he's definitively still on that path.
Disagreeing with that assertion doesn't mean skittles and rainbows. It just means there is no compelling reason to write off the potential for further development at 20, 21, 22, etc. and declare that he's on the Dainus Zubrus path if games like last night turn out to be the high points this year and not his median performance level at 19. If anything, that's far less "skittles and rainbows" than the idea that it's realistic to expect Slafkovsky at 19 to match last night's performance 50+ more times in the best league in the world IMO. A lot of people wanted to put Caufield in the "Mike Cammalleri mold" after he had ups and downs in his rookie season too.
If last night's game truly becomes his new median/average performance level that he can sustain over 82 games (which would imply that he will play something like ~20 games significantly
better than last night as well) that would be absolutely exceptional and he would be a top 20-30 forward in the league already as a teenager. For last night to be his median performance over 82 we'd be looking at a ~30G 80P season at 19. I'd love to see it happen of course, but I don't think that's a remotely realistic expectation for any teenager in the NHL outside of the Crosby/McDavid/Bedard category.