I wonder if the Mac Sparrow userbase is a very "early adopter"ish user base that has never really thought about abandonware on the desktop before. (There is no abandonware in web services, they just disappear.) TextMate 1, NewsFire and Photoshop CS3 are still very much alive on my computer. I have friends on 10.6 and Skype 2.8 (as far as I know), and family using software that came with their decade old Windows XP machine. No big deal.
The iOS userbase I can understand, as the devs apparently teased them with iPad screenshots.
The iOS userbase I can understand, as the devs apparently teased them with iPad screenshots.