Interesting but I really don't envy working for a unicorn. Usually in such fast paced fast growing companies the most toxic environments tend to come up.
Some of the later PMs were toxic (I wouldn't say it's much better in large enterprises though), but it was great to focus on the engineering at the start and work closely with lots of different partners.
I like to really explore innovative options so too fast of a pace can be annoying being at the bottom of the latter at a fast-paced company.