Officially 3.11 is an improved version of 3.1 and not considered an own Windows Release.
Same applies to the China-only Windows 3.2.

So basically what you are saying is: Win 3.11 was a Service Pack before Service Packs were cool?

It is Win3.1 Second edition so to say.
There is also a second edition of Win95 and Win98.

The one Windows sticking out however is Windows 8.1. Treated like some "second edition" by Microsoft, it internally is handled like a complete new Windows. (Win 8 = NT 6.2, Win 8.1 = NT 6.3)

And that's not what I'm saying, that's what someone put on Wikipedia

Matter of opinion! Plus, I used Windows 2000 loads before XP came around, so I refuse to accept it's not that important.

I don't think it's about importance.
Considering the fact, that the picture above most likely was created for the typical private internet user having some fun with Windows, it possibly makes sense to try to explain the picture by looking at the Windows Releases for home PCs

While several more experienced people may have had their home installation of Win2000, this for sure was not the standard case. Microsoft itself considered Win2000 back at that time too resource greedy and bulky for home use - this is why they kicked in WinMe which only came to existence because the real goal of merging their product lines was coming late and happened later in form of WinXP.

And of course - matter of opinion.
I just had the same thoughts (every 2nd Windows seems to be crap - a simple reminder which up to now worked perfectly fine for me ) today at work and needed to waste time. So I thought about the same question which came up here: what about NT?
...and started looking up information

However when looking at the picture again I think Win10 will be a good thing. They had enough time to collect all complaints about Win8 and fix it

Why Windows 10 is called Windows 10. Makes a shit ton of sense if you ask me

That sounds plausible, yes.

Firo, it's okay, I was not being serious.