I suppose displayport over thunderbolt plus embedded USB hubs in computer monitors gets close, but the display settings controllers usually require proprietary drivers and are vendor specific.
DisplayPort have DDC to control display settings. But I don't know how much settings was standardized and implemented by vendor. But at least, the backlight was implement by most vendors, many users use it.
Raspberry Pi Zero 2 can run Linux. So you can run mail client on it of course.
What ever DisplayPort do, HDMI do more badly. HDMI also requires Annual Fee to get document now (since 2021, before that the document was public available). And this is not the worst thing, the worst thing is the HDMI forum disallow anyone open source a driver which support HDMI 2.1 or higher.
https://gitlab.freedesktop.org/drm/amd/-/issues/1417#note_2303163
It's difficult to have. The members of HDMI Forum are almost the TV manufacturers and the members of VESA (the maintainer of DisplayPort) are PC and GPU munafacturers. So TV almost uses HDMI and monitor almost uses DisplayPort.
The green PCB on left-bottom corner breaks the consistence of design...
It "converts" from and to Ethernet frames, of course. There is not actual L2 difference between PON network and normal fiber ethernet network. In simplified description, it just replace active switch with passive optical splitter.
Yes. Like fiber ethernet, differnet speed need different ONT. But noteworthy, there are some different standards for the same speed level, they are incompatible. For example, EPON and GPON, they are both for 1GbE but incompatible.
But with screw, when something dropped, it may pull the whole connector socket from the machine... My friend's monitor was broken because of that.