Yeah it's interesting how similar what happened with Palm OS 6 was to Copland. They had a working, but outdated OS that had been hacked onto a new platform as a stopgap, then they couldn't get the rewrite meant to take full advantage of the new hardware out the door. Palm OS 6 was at least finished, but it never got used on a shipping device. There's an interesting Reddit post going over how the OS design was fundamentally flawed when combined with the ARM processors that were available at the time: https://www.reddit.com/r/Palm/comments/1422bqy/palm_os6/jn5o...