The Weekly Squeak interviewed Avi Bryant recently (scroll down to get to that bit) - and he said something interesting about continuations:

One thing I’d like to do is reduce the dependence of Seaside on continuations - they drove a lot of the initial interest in the framework but they’re becoming (or seeming) much less important over time, and the use cases to which they’re best suited are these days often addressed with AJAX instead. Right now they’re creating an artificial barrier which stops Seaside from being ported to some dialects (like Strongtalk, Smalltalk/X and VAST) which don’t support continuations but would still benefit from a continuation-less Seaside.

That's interesting - I'd be interested to know how he intends to replace continuations and keep Seaside as Seaside.

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