For sure, for some users. Other users were attracted to the Note range for reasons other than the stylus, such as SD card slot. It's interesting that no other vendor sells a phone based on good stylus support.
For keyboards, the Qwerty Moto Mod keyboard looks interesting, and IMHO a detachable keyboard makes more sense for a phone than a permanently attached one. (If keyboard develops a fault it can be swapped out, phone vice versa, keyboard can be used on the train but then left in your bag when you go to the pub).