Not GP, but: Realplayer compressed everything to hell, the quality was absolutely atrocious. I believe it was buggy as well.
Quicktime was a behemoth that took ages to launch. To speed things up, it liked to auto-load and be active in the system tray, slowing system start down even further and taking up precious ram on the off chance that you might want to watch a quicktime video. It also liked to register itself as the video player of choice for other formats, because why would you use a decent player if you can use a shitty one that was made by Apple? Fuck quicktime.
The first effects could be witnessed thirty years ago. But it's becoming increasingly difficult to ignore. That's why the fossil fuel industry has moved the goal posts and introduced the "climate change is of all times, it's not caused by us" talking point, as demonstrated by Victor. But Victor is behind the times, the new one is "yes, we caused it but it's not a big deal".