This is very exciting. Here is the APK I downloaded. And the associated discussion.
It even already seems to support stylus input which is very exciting seeing as there has been talk of porting RNote to Android.
Tar pits rely on crawlers being dumb. That isn't necessarily the case with a lot of stuff on the internet. It isn't uncommon for a not to render a page and then only process the visible stuff.
Also I've yet to see any evidence that Arubis is any worse for the environment than any basic computer function.