Okay, is having an old copy a problem? I always run a bit behind for security reasons (want to give it some time in the wild for bugs to be found). Version 0.13 is only 10 months old. Or is this because my blockchain is based on even older versions of Bitcoin and upgraded every time?
No that means you synced your chain with a super old version of Core and never had to nuke it since. Nothing wrong with that, but the size of the early block files is a tell.
Meanwhile I started ArmoryQT by itself. I blazed passed the first steps (organizing chain, building database) and again is hanging my computer while scanning transaction history. Anything I can see or do?
Edit:
ArmoryDB memory usage is 3.6GB. Total memory usage is 93-99% ArmoryQT UI is hanging (like always, the little spinning banner is frozen)
No this means your computer is so weak that you can 100% trigger this issue even on top of a completed build. I've got a VM gimped enough that I ran in the issue every other 5 scans now (I've never managed to reproduce the issue before), so I think I can get it under control. You'll have to wait for testing build with the fix or build it yourself once I push.