[shubhamjain]

Most bloggers already use some sort of email marketing software. Having used Mailchimp, I can say that it falls into the category of software that solves the problem but isn't delightful to use. In addition to that, it lacks several features that could make automation easier, so you're pretty much out of options if you want to automate a series of emails.

Convertkit grew remarkably well because it tapped into the right problems. I think people often underestimate how giant of market "email marketing" is.