Sooo I've started on another story, tentatively titled If You Weren't Married, including the outline of a sequel. Cuckolding tales aren't my usual thing, but I feel that I've come up with compelling characters and scenes that obligate me to at least start sketching them on the screen. Other stories are continuing, at a slower pace.
I don't believe the suggestion of "write what you know" has ever been entirely true. Very few people have experienced being in space, for example, or know what it's like to be in a consensual incestual relationship (at least I assume so), which would rule out a lot of stories on SOL. The adage might better be phrased as "write what you know about." And in the age of Google, there's no limitation to what you can learn about a subject.
My preference when writing about a place is to be in that place, to soak in the atmosphere and translate it into prose. It's one of the reasons why so many of my stories are set in Canada. But for obvious reasons, that's not always possible. I've found Google Maps Street View to be an excellent way to get a feel for "life on the ground", while I also have open tabs in DuckDuckGo researching brassiere cup styles, industrial lofts in Toronto, lens optics and fur coats.