When comparing lit-html vs Dust.js, the Slant community recommends Dust.js for most people. In the question“What are the best JavaScript templating engines?” Dust.js is ranked 9th while lit-html is ranked 12th. The most important reason people chose Dust.js is:
Easily extendable using filters and helpers. Can consume any public API.
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Pros
Pro It's just JavaScript
It's powered by a JS-feature called tagged template literals. No JSX. Manipulate templates as strings with all the power of JavaScript available to you.
Pro Filters
Easily extendable using filters and helpers. Can consume any public API.
Pro Cache templates at the client side
Dust.js compiles its templates to plain old javascript, and since javascript files are cacheable, that essentially means your templates can be cached at the client side.
Pro Write once run anywhere
Since Dust's templates are written in JS, there's nothing stopping you from running the same DustJS code both on the client as well as server side (if it supports V8/Rhino JS engine).
Pro Interactive tutorial
Dust.js is quite easy to begin with, thanks to it's powerful interactive tutorial.
Cons
Con There are no new releases
And apparently Linkedin will not support it more.
Con Not enough community support
Since the number of people currently using Dust.js is quite insignificant as compared to Mustache js and Handlebars, you're less likely to get your question answered or issue resolved if you start using it.