Re: They can't even have sensible version numbers
Don't know if trolling, or you genuinely don't know, but either way, the format is YYMM.
i.e. 1809 is 2018 September.
I think the idea was that you could see just how old your version of Windows was, by just looking at the version number. Granted it's probably confusing to some people, as you'd have to be told about this, or would have to read about it somewhere.
From what I can see, they basically copied Ubuntu, although at least they use a separator between the year and month, i.e. YY.MM that imho makes it a little more readable than the Windows numbers.
Also the plan was to release a new version of Windows 10 every 6 months, (also like Ubuntu), so you have a 1803, 1809, 1903, 1909 etc. Although they've delayed the latest update for some reason, so that is going to be 2004 rather than 2003.
As an example with Ubuntu you have...
18.10 is 2018 October
19.04 is 2019 April
19.10 is 2019 October
and so on, a new release every 6 months.