The thing about back then that was so amazing is the amount of personalization you had with your desktop environment. Windows 95/98 had different skins/themes you could use. Winamp and many other apps allowed skins. You used to be able to make your computing experience your own. We've lost that and really need to get it back. There's the ability to do this with Linux DE's of course, but that's not enough.
I think its commonly cited how we "used to have so much customization" and now we dont, and i see that more as an issue with motivation over missing proper functionality. Android phones and iphones to an extent are extremely customizable in almost every facet of how you use the phone, and yet outside of social influencers selling an aesthetic no one really cares to take the time to customize. Even when entire theming…
I had a job where I was stuck at a desk 4-6 hours a day and this let me have the best possible sound out of cheapo soundcard and speakers. This made a significant improvement to my work experience and state of mind. Allowing standard plugins to snap-in is a brilliant move, and lets those who have the time/need to do so without the app developer having to spend their energy creating native custom EQ, compressors, etc. This philosophy has carried over to REAPER (Winamp dev Justin Frankel's DAW).