Yeah I read further down in the comments that Aeon and Kalpa have actually diverged quite a bit, the installer might be one of those divergences. How are you liking Kalpa?

The main benefit of sleeping to RAM is of course the resume speed, which makes it more suitable for when you just left your computer inactive for 15 minutes. That goes double if you use encryption without TPM unlocking.

For leaving your computer overnight, hibernate wins on all fronts. I'm enthusiastic about sleep-then-hibernate schemes, but haven't gotten them to work on my devices yet.