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> What Sweeney thinks has nothing to do with it.

I don't know if this is a fever dream or if it actually happened, but I seem to recall reading something about Tim Sweeney using Linux for a week to see how it compared. If he liked it, Epic Megagames would publish titles w/Linux support. He ended up complaining about some irrelevant things in KDevelop and it was pretty clear what his intentions were before even trying things.

I can't find any reference to this online, but I'm pretty sure that it happened. This would have been ~1998.

edit: It may have been Mark Rein?