I believe Impeller is even worse with regards to all the issues mentioned in the parent comment. In particular since it is so tight to Flutter.

I get the point about it being developed with one primary objective - but perhaps a naive question here - in the end isn't that primary objective a shared one - to render text, lines, curves and images as fast as possible, via some sort of higher level API?

And to do so onto multiple OS & hardware backends?

Skia relies heavily on runtime shader compilation, which is slow and causes frame jank but improves peak performance. Skia also supports much older devices than Flutter does.

There’s no free lunch, Impeller has a different set of trade offs that are a better fit for Flutter.

It's the old coupling versus cohesion problem, isn't it? The tighter the coupling the more likely that abstractions leak across API boundaries. The tighter the monorepo the less likely there's a concerted effort to avoid breaking changes and consider long term API stability.