Though if your friend is over and wants to check their msn, DO NOT LET THEM LOG IN TO YOUR TRILLIAN. It will merge your friends lists because Trillian followed a "one person many accounts" model, not a "many people each with many accounts" one.

Both still exist:

https://trillian.im/

https://pidgin.im/

Just one open source free platform would be fine. IRC with modern protocols for pics and video that can be viewed in the chat app of your choosing. Keep it simple, or add backgrounds. Mini chat boxes, or transparancy. Basic low resource use, or heavy, you decide, same open cross app platform.

I think I have my Advisor Gold around here somewhere

OLED. Can still use modern advances in practical tech. Can still have open source, modern kernel linux, modern ram and low power 3nm chips. Just keep all the tech simple and clean of marketing and addiction. All the good, less of the bad.

How about a non-chain? Local pizza places still thrived in the 90s. That was one of the best parts of the 90s. Wal*Mart was slowly killing off mom-and-pop shops, but it hadn't finished yet, so there was a lot of variety and still a lot of craftsmanship in general.

Let's do both, gotta have options. and a Taco Bell

Dominos is the best national chain now, in the 90s not so much. But Pizza Hut has always been too oily.