Matt Asay is probably right about incremental change being preferable -
particularly when dealing with a base as large as that of email users, which, if I'm not entirely off base (pardon the pun), was the group to which Wave was directed. Still, I'd hate to see Google give up on revolutionary, non-incremental projects - these are necessary and, if human ingenuity doesn't utterly fail, bound to come, if not from Google than from other quarters. I suspect that the experiment with Wave, in which I participated as a (somewhat confused) user, has taught Google developers many things which will prove useful in other products, not least in further developments to Gmail, of which I am a (hopefully less confused) enthusiastic user. What I hope Google as a corporation will learn from the experience - I don't wish to call it a debacle, as I don't think it was that, even if it has been discontinued - is the need for much more testing out-of-house before releasing such products to the general public. The more revolutionary and creative, rather than incremental, these innovations, the greater the necessity of such testing. As one of them, I know that Google possesses a corps of enthusiastic «trusted testers» ; I hope that they make even more use of us the next time 'round !...
Henri