Condolences, that really sucks.
There wasn’t sad food to go along with it but, my wife and I had a very similar experience. My nephew passed away after 3 months of trying to repair a heart defect (HLHS specifically). My SIL, her husband and, her other kids had been living with for the past six months because we lived near the hospital he was treated at. Their extended family spent a lot of nights with us as well.
The day after he passed away, they all went home. My wife and I are child free so we were just alone in this quiet, empty house that had been loud and crowded since we found out our nephew was going to be born with a bad heart. The weight of the past months hit us all at once and we sat there sobbing for what felt like hours. It’s been like three years and I still get teary thinking about it.
I don’t know that visibility is Mastodon’s biggest problem. I’ve talked to a lot of people who tried it but just didn’t find it easy to use and just bailed. I think people expecting it to be diet Twitter and getting frustrated when it isn’t as populated or user friendly is a bigger issue at this point.