It would seem that you only need to create (I say "only, in both a sarcastic and pragmatic way) three versions of the Linden content. (Spring-fall-winter) Not something that would be expected right away, but something that could be brought in. No need for scripting -- I would think that once designed the version could be implemented per sim... but as I said, thats just what I "think".
The Seasons and their effect could vary according to where they are in the continent. Coastal's could have no change (who wants winter on a beach?) while interior could be conceptually a higher altitude and thus more effect. Anything that adds more a feeling of realism is to the benefit of the world as a whole. Exactly WHERE in the SL world your home is is=== all that should matter... Personally I would love snow for winter holiday season. Just for the fun of decoration, or the roll play of keeping in out of the cold, or for the sales of heavier clothing and ice skates. It would obviously be up to the home owner as to if they decorate their home appropriately.. would be fun to hold neighborhood contests!
If you don't like snow... omg.. this is SL.. you get all the good and ignore the bad... sheesh.
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