Can't attest to framework, but after switching to an arch based syttem on my Quite low level HP Envy 13'' I get about 130% - 170% of time out of the system.
Yes, I am running mostly in dark mode now. Yes, I am using the terminal significantly more often now (80% of the time). But also I have always a browser, always Slack, WhatsApp, Obsidian and more often than not a few other things running on virtual screens.
Just the added battery life made this my daily driver. Yes - I so, so want to buy a framework. Still waiting for the multicolored international keyboards - and also the prices for memory just kill it for me right now. The system I would love to have is about 2k more than a few months ago. I just can't splurge that much right now.
unless you screen is OLED, dark-mode has no or zero impact on battery usage, maybe even non-significant impact on OLEDs
I'm using CachyOS on my framework and after switching from windows gained about 30%-50% battery life depending on exactly what I'm doing.
Wow. For as long as I can remember it was usually the opposite for me. Even after configuring TLP and looking for things to tune manually with powertop, I usually didn't get battery usage quite as low as I wanted. I thought it was still typical for Windows to be better.
Are you running a DE or just a lightweight WM?