So to elaborate:

Enlightnment wouldn't be a good fit for Solus. The primary development focus of Enlightenment is on its toolkit, which is orientated towards mobile and embedded usage (via Samsung/Tizen)

Outside of that, its a mostly unchanging desktop which sees the same old crashes with every release for the past 5 years. I don't feel that the focus aligns with Solus, and Enlightenment doesn't focus enough on its own desktop to warrant inclusion.

Seems reasonable