In 1990 you could have up to 4 displays on a NeXT Cube + 3 NeXTDimension 32bit colour boards. These were 1152x864 32bit colour displays at a time when people were using 80x25 16 colour text (likely, wordperfect/Lotus 123), or /maybe/ 640x480 16 colour graphics in windows 3.0.

NeXT had full ipv4 support from the start.

Unicode wasn't a thing until after Apple bought them.

One experiment I've done on my own NeXTStation turbo was run equivalent applications on both a NeXT and a modern Intel mac pro. Mathematica, email, Framemaker/affinity publisher all take roughly the same time to load and execute similar tasks.

Yes you can't do 3d, video, or AI on a 33 year old NeXT, and the image files would be smaller, but beyond that you could easily do your day to day work on such a system. It doesn't feel old at all.