The short answer is that: yes, some people care. As of November 2016, I received over 900 E-mails about the project to my private inbox and my fc-solve-discuss group’s folder also contains over 900 E-mails. Furthermore, some people to whom I mentioned my solver in real life, expressed interest in it, in part due to the fact that in Israel, where I live, many people played it on the Israeli military (= “IDF”, “Tzahal”)’s computers during their draft/etc. service. An internal survey conducted in 2004 found that it was the preferable game of 29% of the surveyed soldiers - thanks to the Hebrew wikipedia page about Freecell for the link. One should note that Israel has instated a draft for girls as well as boys, so some of the people who were impressed were females (and often quite attractive ones).

I have written a section in a three-part essay titled “How to achieve world domination” about that and niche software in general.

Freecell may have been declining in popularity lately, but I expect interest in it to continue for a while. Furthermore, the prevalence of Freecell games on mobile devices (e.g: smartphones, tablets) seems to have rekindled interest in Freecell solvers.