My daily driver is still a Dell XPS 13, 10th gen Intel i7, 16gb RAM and 500gb (nvm) SSD. I bought it referbed. I’m running Fedora 38 (Workstation) currently. Everything works but the fingerprint sensor (which I don’t care about). It runs for hours as long as I’m doing “normal” stuff like browsing and writing. It runs so long that I get tired before it does. The only time the runtime suffers is if I’m cranking the cores (encoding, compiling, etc). No voodoo required, it just runs this way out of the box. Even the onboard firmware gets updated by fwupd.
The only oddity (to me) is that it’s USB-C only (no A ports) so I carry a small dock if I need to plugin a normal USB device or network cable, but that’s rare for me.
I haven’t had nine hours uninterrupted time in quite a while, but I’ve done six to seven with plenty left in the tank. I’ve kinda stopped measuring it because of that.