Suckless
Suckless is a cargo cult emphasizing what they call "simplicity", "unix philosophy", and "minimalism". In practice this minimalism looks like them writing the most trivial program imaginable and then exclaiming how fucking awesome their code is for being aligned with all their ideas how software should be. Their code is purposefully undocumented and uncommented, which only works since their code base is usually a few thousand lines. Suckless also attempted to make multiple Suckless Linux distributions, among them one that had everything statically linked resulting in an OS broken by design. Further, they think software peaked in the 70s and call everything that isn't structured like Unix System V bloat or something. It's remarkable how they cannot imagine a future where software doesn't adhere to some philosophy from almost half a century ago, as if that was the best thing since sliced bread and couldn't possibly be improved upon or updated (Note: I'm myself against update culture, but there's a difference between update culture and not using software written for ancient mainframes). Surely, if you complete the temperature converter exercise in the "The C Programming Language" book enough times, you will truly understand how great software ought to be, but I digress. It's true, if all programs you know are cat, sed, and cut, then there's not a point in rethinking your ways, but if you want something like Sony Vegas or IDA Pro, the Unix philosophy doesn't scale well and is not really applicable to such programs at all. Those are mostly points from the "unix philosophy" crowd, that a lot of suckless people subscribe ideologically speaking, but there's more. Their software is configured through source code, since they don't want any filthy nocoders even using their software, Whether you like this gatekeeping measure is up to you, I think it's good that one doesn't have to learn yet another configuration file syntax, but then again, most configuration files formats are more or less intuitive and require little reading.
Note 1: Some of them consider Plan 9 to be a good continuation of Unix, so maybe it's not entirely true that they cannot imagine something that isn't Unix from the 70s, however, Plan 9 is also not that different from a design philosophy standpoint. Don't get me wrong, it's a different philosophy, yet the core principles of it are the same.