With availability of bags and with a small camera you can improvise, having weather sealing is really not an issue, at least for me. As I get older getting wet, cold and miserable has lost a lot of its appeal.

That being said, many high end lenses are not weather sealed, like Zeiss, so having weather sealing on my Canon bodies and using a Zeiss it is not really water sealed. And I know a lot of people who would use a Canon 17-40 stating that is is weather sealed, but it is only sealed when you have a front filter screwed on, per the manual. So weather sealing is not that critical for light rain and it is easy enough to deal with when and if it is needed without having them redesign all the lenses. I guess it is more a marketing choice, we shall see so far it is all rumors.....

Alan