Thanks for sharing Cerberus, looks like a great tool! 
I understand the need of a simpler tool to quickly sketch out email HTML ready blocks&#x2F;layouts.
However, there is key reasons about why we decided not to stick to strict HTML with MJML. 
First, the abstraction layer we provide helps to reduce the maintenance effort by removing the pain to stay up-to-date with the last email clients updates. 
Second, it is simpler to write (thanks to the lighter&#x2F;more semantic syntax).
Last, but not least, our component based approach powered by ReactJS makes the language highly extensible and helps to reuse the same layout across different email communications.<p>Hope it makes more sense to you now and you&#x27;ll have the opportunity to use it for your developments!