Alicornutopia

What? Isn't Ea-nasir the guy who kept a room in his house filled with all the complaint letters he got over his bad business practices?

Wikipedia says he’s the guy who got the first known written complaint and doesn’t mention others.

Also AO3 has 4 works about him, including two that set him up with the one writing the complaint.

Well, whenever I see references to him going around, I see people asserting that there was a roomful of them, and this isn't the sort of subject on which the internet normally tends toward baseless fabrications.

There is a lot of information about this one tablet, and much less information I could find about the others, but apparently you are right and there are more, apparently multiple of them indicating his business was shady. I don’t know what makes that particular one special enough to get its own Wikipedia page.

No, Great Mage Ea-Nasir is several millennia younger.
That being said, I did name him after the guy on purpose.

Are there plans to incorportate penumbral world-walking into Effulgence, or will it likely remain a sandbox-specific plot device?

Effulgence has it that between sheaves interworld transit must be established first through Milliways.

I believe Harley and the admin would both disagree with that statement.

Does that mean there aren’t any Effulgence plans for it or that you can only find your way to worlds you’ve already visited?

Downside and Jokers are special cases and Penumbra isn't.

There are no Effulgence plans for it.