But of course on a Win/Linux system you rarely need to use three fingers at once. On mac this is all too common for even the basic tasks you state.
Shift + End: Select to the end of the line
Home + End: Select to the beginning of the line
Home or End: Move to beginning or end of line respectively.
What's worse is when I plug in a keyboard with Home and End buttons on a recent Macbook Pro they still don't work. Do I need another plugin for that? Even if I do personally I don't find the Mac keyboard shortcuts better than Linux/Windows. Tbh after using Mac for 2 years running now every day at work I still don't quite get how people find it easier - I still wish personally for a Linux or even Windows machine to speed up my productivity.
And that's because people prefer what they are familiar with them - the mental leap to jump to another way of working for most people isn't pleasant and isn't really worth the investment. Mac still feels like a "second language" to me just as Linux must feel to mac users - I'm always translating it back to "how do I do this Linux/Windows thing" in Mac. In the end Linux, Windows, and Mac are perfectly capable OS'es and the differences is marginal between them which makes switching difficult. But I do prefer my Linux machine these days - more just comes out of the box.