The keyboard shortcuts are way more inconsistent on Mac. On Windows and KDE (and I presume Gnome though my experience is very out of date), Ctrl shortcuts pretty consistently relate to the window that currently has focus, and Meta/Windows shortcuts relate to manipulating and navigating windows as entities. No such rule of thumb exists in Mac.

The simplest example of that to me is Cmd+T to open a new tab, Ctrl+Tab/PgUp/Dn to cycle through tabs, whereas it's Ctrl for all of them on KDE or Windows. There simply is not a way to deterministically switch to a specific other program/window, where in Windows/KDE you can do Win+1 to move to the first program on the taskbar (and so on with other numbers). And the behavior of Home/End is very inconsistent between programs, with seemingly no consistent way to move the cursor to the beginning of the current line.