You and 5 others
At this rate, I doubt if it will get any attention.
This feature request is already posted on dreamweaver user Voice.
We collect all the feature requests and bugs here and also get it up-voted for prioritizing.
Please leave a vote on it.
Symfony, Expression Engine, Craft, Bolt are just a few examples of frameworks that rely on twig... and been around for many years.
Sometimes there are feature requests and then there are industry standards - twig is a standard.
I am fairly certain developers ignore DW because Adobe lacks the necessary insight into the industry - you're not web developers.
Conversely, DW users do not use Twig because it is not part of Dreamweaver. To my shame I must admit that I belong to this group.
Having quickly glanced through the documentation, I agree that it would enrich Dreamweaver with the inclusion of Twig.
I have voted and invite others to do the same.