Windows 95,98,2000,XP,7
>Emulation (for 95 or 98)
>Linux DE with themes (piss easy on xfce and KDE)
>Modern windows with hacks that adds those themes

>Flash
ruffle (even supports AS3 now)

>Old MP games
They're all playable, just get some friends and make a server

Winamp
>vlc with winamp skin
>Audacious with skins

You can pretty much still go back and avoid all the modern shit