Perhaps in recent years informational blog articles are mostly ads for the writer's products, services, and the chance to employ them? Informational stuff will remain public and free because eager seekers of monetization will easily convert to creators of marketplace-protected products and sell something on Steam or Gumroad. As long as one's primary purpose is to be informed, there will always be some writer not monetizing that particular piece of information. Maintaining the infrastructure (data centers and cables) eventually costs a lot of money and it must be paid by somebody eventually. Serving text pieces from a CDN is cheap enough for any blogger to personally afford, but no sane video hosting website will stop putting ads around.
I think the current boot feature will disallow arbitrary EFI booting. And most mobile device manufacturers do not allow bootloader unlocking for consumers. That being said, there is no guarantee that a determined child will be prevented from apt install git build-essentials and cloning Chromium source code and compile a modified version of Chromium; or from using ncurses and libcurl to hand-make their own tiny browser; or from receiving a premade browser using nc -l 8080 > www.AppImage. As long as the exposed functionalities are Turing-complete and any tiny networking is possible, a determine child will eventually make it happen.
Much as I respect and appreciate these efforts in maintaining compatible alternatives to canonical Mac OS X and Mac OS XI, in modern days I would prefer to run Mac OS X/XI applications in my GNU/Linux system over some compatibility layer (FoundationLibc, CorePulse, PicQuartz, Melkan, etc), because, in the years after leaving Mac OS X, I have establish new workflows which are mainly GNU-based.
I still want GarageBand and perhaps Processing / Glyph, but I prefer embedding those Mac OS X/XI apps in my GNU workflows. Rebooting to another OS wastes time and virtualization has performance penalty; neither is fun.
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Ownership of Computation, Liberty of Encryption, and the Pursuit of Privacy.