disi: In my current campaign I only crashed if I finish a shard and return to Astral, but that pretty much every time. It does create a savegame in the Astral just before crashing but you may miss a conversation.
A solution is to go back to the shards last save and try again, the crash is random and eventually you end the shard without.
falsegodz: When I first played MotBW I went 20 hours without a crash but after that it became completely unstable for some reason and would crash at least a couple of times an hour. This rendered it pretty much unplayable and even several complete un/reinstalls didn't fix it.
Luckily I actually like Imperium and have played more than 60 hours without a single crash.
But I want to state this again.
You get plenty of savegames, even when leaving the shard I got a save in the Astral before it crashed. But I also had the standard 5 last turn saves on the last shard to go back to and try again.
I am on the ~15th shard now, killed two other masters, defend myself the third time now on my shard and had maybe 4 crashes.
The last few shards I had no crashes at all going back to the Astral.
I did have a few fights with 0 health units still standing, but you can just let it auto-fight and it ends with you winning. Or load the last save.
p.s. Windows 10 64bit with pretty high spec machine.
I did not look at Imperium yet, but it was an instant buy for me :)