HTML Templates
Every document produced by Plank can be customized. This is not a special thing but...
Have you ever tried to require a custom template from your current CRM vendor ? It usually means big costs, long times and a few developers involved.
A general purpose language
Building deocuments with HTML + CSS mean that everybody in your company can take a chance for small improvements. This reduces costs and time consuming operations even when the developments are required to be executed by a Plank staff.
Modernity
If you want a more sophisticated look for your doucuments, what is better than HTML ? It is the king of markup languages, it is the syntax used to build websites and that means that your company can easily adopt official templates, colors and styles in every comunication issued by Plank.
Costs and times
This choice translates into less costs and quick customizations.