Online videos are often a great historical reference for obsolete computer games, because they show the game in context of an active community: https://www.rockpapershotgun.com/2019/05/06/how-youtube-lets-plays-are-preserving-video-game-history/
(I suppose this also applies to MUDs and online communities that aren't gaming related.)
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Watching Hytale vs Minecraft discourse reminds me of how games feel different when they're new.
Single player games have an online discussion that occurs shortly after release.
Multiplayer games rapidly develop a meta. I tried UT99 years after release and it wasn't as much fun.
I hear people say that Go is often hard to search online (hence sometimes "Golang"), but the vast majority of language names are common words. Names with punctuation (C++, C#) are hard too.
Is this a big problem in practice? "Perl" isn't a dictionary word, but it's an exception.
The book 'The Art of the Metaobject Protocol' has two chapters in the public domain and available online!
Chapter 5: Concepts
Chapter 6: Generic Functions and Methods