Any rollup experts around?

In my continuing saga to figure out how to keep my existing plugins working with the next release when Polymer is removed I’ve been suggested to just use Rollup to package Polymer with my plugins.

I’ve searched and searched and even went to the Rollup discord and surprisingly (or not?) the answers to figuring out how to actually use Rollup are very vague and always seem to assume a fairly advanced prior understanding of JS or package managers or Polymer or etc.

Can anyone explain from an absolute beginners perspective how I can use Rollup to get Polymer pre-loaded in my plugins?

Otherwise, I’m not sure I can figure it out before the next release and the plugins will stop working (I assume…)