For bands that are on LMA, I upload both 24/48 and 16/44.1 versions as a courtesy to people so they can pick which they want. On average, I'd estimate that downloaders pick my 16/44.1 versions with about 2 to 3 times the frequency as the 24/48. It's interesting though that I've seeded some shows where the 24/48 version has more downloads than the 16/44.1.
For archiving purposes, after I share the 16/44.1 version, I get rid of it and I only keep the 24/48 version. If I were living only for myself, I have no need for 16/44.1 anymore.