As a former note 5 user who got the S8+ because of Note 7 explosions times, I miss my stylus everyday.
However, If you use this thing 2 hours a day, I know for a fact that i'll break after 4 months because I went through 4 of them. Quite expensive too.
I'm guessing that that added stylus "smartness" will make the thing madly expensive to replace.