Can anyone here enlighten me about what has happened to Messy Married Couple?

Their store seems to be up and open:
https://messy-married-couple.umd.net/

Doesn't look like they've posted to the forums or added a new scene for a while, but that doesn't necessarily mean anything has happened, could just be real life getting in the way as it tends to do.

Ta for the reminder though, tempted to add this one to my collection, I do love long sleeve zip front swimsuits as messwear: https://messy-married-couple.umd.net/download_info/sticky-swimsuit-filling

You didn't hear this from me, but I heard they were detained in Switzerland trying to sell fake toblarone bars to the Danish royals.

I may be misremembering things as my memory tends to mix things together. But, I swear about a year or so ago I read a post where they talked about stepping away.