Responsive eMails

I had to design an email that sold the benefits of the company to advisors, who will then pass those benefits to their customers. The email had to be responsive and be able to view on all email clients. For those of you who have coded emails in the past can now its a pain. It's like coding in 1999. I could've selected a template and played around with the code to suit my needs. I went in another direction since templates are set up to be one-size fits all solution. Every project is unique and offers its own set of challenges. I went with MJML because I can code emails quickly and ensure they are responsive without worrying about nesting tables. Another reason I did not want to spend an exorbitant amount of time coding but to focus on the user's experience.