+1 for magnet. Indispensable to the extent that on rare occasions I use others Macs where it’s not installed I’ll gift it to them (and they invariably become passionate about it).
My mother is adopted and 23andMe and Ancestry have both provided me with a way of connecting with relatives as far apart as Canada and Australia. Before “revealing” my connection to them I’ve stated that in doing so I may reveal information about a shared ancestor that doesn’t put that person in the best light (my mum was the result of a short affair between a married man and a much younger woman at the end of World War 2). All have stated they are ok with this and in most cases had no contact to the ancestor involved anyway.