It was clunky under the hood and never received enough love. It would have been interesting to see where WebOS (phone) would be today had Palm survived.

Stuff like Xposed is interesting, but I haven't seen any software for mobile that managed to match the kind of community driven tweaking that Preware fostered.

I see this any time WebOS is mentioned but this makes WebOS sound a lot more innovative than it was. WebOS is widely lauded for two things: (1) the card application interface and (2) the accompanying physics/gestures, especially swipe from edge. Now these are great and appropriately lauded but that is a short list that really pales compared to a similar list of things the iPhone OS had introduced at that time. Other than that WebOS is basically a nicely polished clone of the iPhone OS. Even the cards metaphor itself, the hallmark of WebOS, was used two years earlier in the original iPhone in Mobile Safari and Cover Flow.