Great article, it must have been a lot of work (I've been on the very same road), so I'd do the same with some affiliate links.
I ran away from Mailchimp more than 5 years ago when they started with their shenanigans and arrived at the same conclusion: Mailerlite is great. I used to have lots of respect for Mailchimp for being a bootstrapped business and never taking investor money but once they sold their soul, it was game over. One thing the article doesn't mention is the fact that Mailchimp has been moving from an email marketing SaaS to a marketing platform SaaS. From a quick glance at their services, they now offer a website builder, a CRM, ads retargeting, social media integrations---and as a customer, you end up paying for every single feature, regardless of if you want it or not.