In Norway in December people wake up "in the middle of the night" because sunrise is at 10am: Humans can adjust easily to this stuff, it's just that we like to sleep "late" (as defined by the clock)
I argued that commenters who say permanent DST specifically favours night owls are incorrect about who it favours, because they (most of them) haven't considered the effect of the sun on sleep quality and daytime cycles.
My view is that most solar-affected night owls will have slightly worse sleep and daytime energy and metabolism, because clock-time social requirements will not change (that's the point of changing the clocks after all). Sunshine after will work will make people happier after work, which is reflected in economic activity, but I think the insiduous effects on health are being ignored. There is some scientific research to back up this point of view.
There are early risers here who don't like permanent DST saying "we're not all night owls like you", believing the change is designed to favour night owls.
There are night owls here who say permanent DST will be great for them because there will be less sun in the mornings to ruin their sleep. That implies they have a choice about when to wake, or they are thinking of Summer. They are in the minority even for night owls, because the change applies only to Winter, when most people are already forced by social requirements to get up when it's dark. There is no light streaming in that early in Winter. Permanent DST will only mean that it's dark for longer after they get up.