Total nostalgia talk. Those machines were just glacially slow at launching apps and really everything, like spell check, go get a coffee. I could immediately tell the difference between a 25Mhz Mac IIci and a 25Mhz Mac IIci with a 32KB cache card. That's how slow they were.
Some of us do actually use such machines every now and then.
The point being made was that for many people whose lives doesn't circle around computers, their computing needs have not changed since the early 1990's, other than doing stuff on Internet nowadays.
For those people, using digital typewriter hardly requires more features than Final Writer, and for what they do with numbers in tables and a couple of automatic updated cells, something like Superplan would also be enough.
Those machines could be pretty darn fast - if you get one and run the earliest software that still worked on. DOS-based apps would fly on a 486, even as Windows 95 would be barely usable.