Are you talking about people adjusting their clocks and their bodies to accommodate the change in time? Very few people have a big problem with that.

The problems arise when accommodating the change programmatically in code. How many times did Apple fuck this up with the first few versions of the iPhone with alarms not going off at the right time?

2010 https://www.cultofmac.com/67254/how-to-avoid-the-iphone-dayl...

2011 http://osxdaily.com/2011/03/13/iphone-daylight-savings-time-...

2012 http://www.iphonehacks.com/2012/03/iphone-daylight-savings-t...