Let me get this straight... you don't like the change of a downloadable offline Character Builder to an online web-based one... because of the chance that 5th Edition will come out and WotC will completely replace the 4E CB with a 5E one (thereby eliminating all 4E info from the system), and then in addition just by happenstance that player also then manages to somehow lose or destroy all his hard copy books too... then that player has no way of playing 4E anymore because he's now lost all the items that have 4E rules in them.
You know... I really don't think the Wizards Insider staff was really considering the feelings of that person when they made their decision. And quite frankly... I'm GLAD FOR THAT.
First off, 5th Edition will come out one day, most likely by WotC/Hasbro. There is no doubt in my mind that it will, whether it be next year or five years from now. And, WotC's actions in the past concerning the handling of 3rd Edition stuff after the change over to 4th leads me to believe that support for the 4E online tools will be completely unsupported following the release.
When I said that paper can be destroyed I meant character sheets, not actual books. I'm sorry that I wasn't clearer on that point. I still have all of my books that I've bought from the previous editions, as well as a ready-to-print character sheet folder on my computer with 47 different sheets in it. Obviously, I can play any game I want to.
With 4th Edition, the trend seems to be geared towards using the character builder to make your character and not to use the "traditional builder" as I call it. On the WotC forums, I've seen a Dark Sun game go into a week-long debate on whether to start the official recruitment before or after the new stuff is incorporated into the character builder. The D&D Encounters program also seems to support this new idealogy, but granting those who used the Character Builder to create their own character extra points.
With that said, it seems to me that towards the end of the 4E life cycle, there will be groups that will rely only on the character builder for character creation and storage. With the new web-only Character Builder, a long-going campaign of those who have decided to not switch over to 5E is indeed in peril of a single careless hand at the gaming table spilling soda all over the now only record of the characters.
Well, I hope I kind of clarified my position somewhat.