Pretty much a tradeoff between health/safety benefits for people active in early morning versus health/economic benefits from having more daylight after normal work hours. The two sides will never agree and thus the stalemate we're stuck with. But generally the pro-DST side is winning and has gained ground, we have like a month more DST than we did when I was a kid.

The benefit under the current method of biannually changing the clock is that we don’t have 8:30 sunrises in the winter (this is good, it’s proven we need daylight to fully awaken) but can also have 9:00 sunsets in the summer (this is unnecessary and actual bad for your health, it tricks your body into staying up later).

Most sleep experts agree that we should be in year-round standard time, and there was a bill proposed called the “Save Our Sleep Act” that would have done this.

Personally I like having the sun rise before 8:00 a.m. in the winter, and stay up until 8:00 p.m. or later in the summer. Yeah the time change is mildly annoying and disruptive, but to me it's worth it.

The US gave it a go in the 70's, but public support dramatically dropped after the first winter.