They haven't been relevant to anything user-facing at all since they sold the Thinkpad line, and their "golden age" was over by ~2000. Their hardware was awesome in the '80s and '90s, truly great stuff, but they've been mostly out of that game for about 25 years, and totally out for what, almost 20? Quite a few people on this site were born after the last piece of IBM hardware they might have appreciated was manufactured, and most of those folks may never have touched a single item of IBM's.

Microsoft's best work is also pretty damn far in the past, at this point. All my fond memories of them are pre-2010. I loved a lot of what they were doing with various little software projects in the '90s (encarta! All kinds of weird experiments and little programs and games!) but that seems mostly gone now. I expect any list like this for them would be a handful of old pieces of software and HID items from the '90s and '00s (remember when they made really good mice and pretty good keyboards?), but dominated by a complete inventory of everything the xbox division has built to the point that it'd look more like some kind of gaming-focused list.

I'm not sure Amazon has built enough non-terrible user-facing stuff to make a top-50 list. Or a top-25. Or a top-5 that's not just a five different Kindle models. Their entire Fire line sucks, which just leaves Alexa. Not enough meat to make a meal like this out of, I think.

Google's list would be hilarious because it'd mostly look like a copy of that Google Graveyard site.