As someone who hangs out online with people who don't do DST, it's really annoying to have to re-learn each-other's schedules twice a year. Although that's nowhere near as bad as when I lived in a country with DST and worked with people in the southern hemisphere who also did DST. It would mean that at some times of the year, 9am for us was 5pm for them, so a short meeting was fine. But, other times 9am was 7pm. And then there were the weeks where 9am was 6pm because one side had gone DST and the other side hadn't yet ended it.

Even worse, the logs system at the company timestamped everything in silicon valley wall-clock time, so there were 3 different time zones at play, which all changed at different times.

Really, I think eventually we'll all be on some kind of global time system. So, if I say the meeting is at stardate 1230.2 nobody has to convert to their own local clock.