Cargo cults themselves have likely been overinterpreted: documented cases are relatively few and historically specific, rather than a widespread or enduring phenomenon. Still, the image is powerful, which is why cargo cult programming works so well as a metaphor. Ritualistically copying code without understanding how it works is extremely common in software development.
Check out the Fish for Bash users guide since it explains the main differences.
The few issues I’ve seen for daily use are that export does not work and you need to use set -x VAR value instead, $PS1 is not recognized because Fish uses its own prompt system, and wildcards work a bit differently...
Language changes through use, not through rules or intentions to "preserve" meanings. You can’t freeze a language, words evolve based on how people actually use them, and today GIMP overwhelmingly refers to the image editing software, not some outdated insult. If you search for it online, you'll find pages of tutorials and plugins long before you even stumble on that old sense.
English is a global language now, the majority of its speakers aren’t native, and it feels ethnocentric to assume everyone experiences a word the same way a small educated group of native speakers might. Meaning comes from context and community use, not from etymology.
Semantic shifts and reappropriations happen all the time. Words like "queer" completely changed meaning over time. From my point of view, GIMP has done the same thing.
Sorry if I miss some nuance, I’m not a native speaker myself...
I have a Kindle, and it's relatively inexpensive (I assume the business model focuses on selling eBooks rather than the reading device itself). I never turn on the Wi-Fi or sign in; I use it offline by uploading books through USB with Calibre. I've read that it can be jailbroken, but it has met all my needs so far. Would this option work for you?
I also recommand Task.org app to sync tasks with CalDAV and I use raw Markdown files with WebDAV, both using the DAVx5 app for synchronization. For editing Markdown, I prefer minimalist apps that suit my needs. Right now, I find SimpleMarkdown (with disabled telemetry) to be the best choice.