Quote from: Turner on September 10, 2013, 10:36:43 PMwhat about windows 3.1....16-bit is fully deprecated by most account (mine too). There are barely no 16-bit powered user computers active in 2013

32-bit is still worth (I assume it'll be around for a long-enough time to make a smooth transition)
64-bit is kicking strong. Basically it's already a chunk of the present, and definitely the future.
Heck, some people is already deprecating WinXP since it's going to be dropped by Microsoft next year.
It doesn't make sense according to me, still there is a large XP user-base which deserves attention. Furthermore, while it's true you might have to skip the "new goodie" in town when targeting compatibility, developing practices aren't too extraneous for XP to avoid supporting them already.