Just mildly optimistic, actually. From my perspective, the big selling point of KSP is the mod-ecosystem. Just like elder scrolls, the base-game isn't that interesting - the vast number of mods (and easy part-customization) is what makes it interesting. KSP2 in that regard will start from scratch, so it'll be years before it has featureset similiar to KSP1. On the other hand, the two main issues with KSP1 (IMO) is buggy physics and bad graphics performance. The later has to do with the engine (unity), and KSP2 uses the same engine, so no improvement there. That to me only leaves better physics as a possible selling point for KSP2. And we haven't seen that yet, so it's a "maybe".
Oh, i had plenty of backups :-) It's just backups don't help, when you ragequit a game, and then when you buy a computer, you just don't bother copying the backup and delete it :-P