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My response to the body of this post is https://www.privacyguides.org/en/real-time-communication/
This might address the URL of this post (I’ve never interacted with “iCloud” so I don’t necessarily know what would be a good replacement for it): https://www.privacyguides.org/en/document-collaboration/
What is an example of “plain-text code”, or of someone fainting at the sight of it?
The Java® Language Specification explains that “Programs are written in Unicode”, which can reasonably be described as “Plain Text”, but I would be surprised to see someone fainting at the sight of one.