Pipedream always was spectacularly odd, even at the time.
Our first computer was an Acorn BBC B Microcomputer.
I suppose that most of all, it reminds me of time when actual, genuine real innovation in UI design was still on the menu.
The OS being on ROM made booting insanely fast. Like 2-3 seconds from cold start to the desktop.
Programs were actually folders, like modern macOS, so you could poke around at how they work. BASIC was still a thing, and I remember being able to edit the BASIC source code of some programs. Felt like "view source" did for the web.
Plus nothing has ever come close to the blue mouse cursor :)