One small nuance... saying "kinetic energy is just a straightforward rotation of the frame" is close, but it's the total energy that is the time component of the four-momentum and mixes with the spatial momentum under Lorentz transformations. Kinetic energy is the difference between that transformed total energy and the invariant rest energy. So kinetic energy isn't itself a four-vector component, but it arises from how the time component changes when viewed from a different inertial frame.
They have varying degrees of 'inelegance' or 'complexity.'
But generally they closely conform to Einstein gravity/standard model, as they incorporate relativity.
But that's still the thing. No theory can explain gravity across the spectrum of variables (from micro to macro scales, apparent lack of dark matter in some galaxies, black holes, why galaxies don't fly apart, etc.) We have a dark gravity problem regardless of which theory you like best.
Also you might prefer gimpshop(or whatever the latest PS-ified gimp is these days), as the default hotkeys in gimp are shit. Ctrl, shift, and alt have universal contexts beyond Adobe products that gimp completely ignores.
Just like Macs and the stupid command button. And don't even think of remapping, say the clipboard, to use Ctrl. Many apps just won't honor it. Because that would just make too much sense.
I think the web page delayed loading is often server-side these days trying to detect bots. Especially with a dynamic IP.... You'll generally be fine after that first detection flags you as human. Also this seems to affect firefox moreso than some other browsers, but that's subjective.
Also, if you're familiar with sysinternals suite for Windows there's a Linux equivalent to all the tools with nice GUIs. So you should be able to track down most process-caused performance issues fairly easily without knowing all the appropriate CLI commands.
As a YouTube app user, these complaints are also part of the core app experience. Notifications often never land, especially if you're _trying to_ follow someone's live streams. Even if you're a mod... (Sometimes appearing hours after the live or even the next day or never.)
It'll even randomly drop subscriptions. Forcing the user to resubscribe.