Great post!

I went ahead and read all your posts in the series:

https://posthog.com/blog/before-the-yc-application/

https://posthog.com/blog/the-yc-interview/

https://posthog.com/blog/moving-to-sf/

https://posthog.com/blog/pivot-to-posthog/

https://posthog.com/blog/after-the-hn-launch/

I'd recommend them to anyone who liked the linked post.