Those are navigation commands... similar to everyone else, really. Most readers have ways that you can just "jump" to the next [type of tag]. So no matter where you are in a document, if you want the next "clickable link thingie", the VO (defaultkey)+command+L simply takes you to the next thing the browser announces as a link (the browser has an AT level in it that tells the screen reader lots of information about the tags around the content).
It's strange that activating a link is special and requires the VO key... maybe Apple was purposely writing around some other issue.
This does explain why Jared Smith said you could use skip links with VO but not straight from keyboard. I wasn't sure what he meant, but now I think he meant this special activation setup.
Seems for you the VO key is mapped to the CTRL key. In JAWS, NVDA and Orca it's usually the INS key (depends on desktop or laptop keyboard layout, plus you can always map some other key instead). Makes sense to use CTRL tho if the other combinations are around that area.
You could probably get a cheaper second hand mac ... maybe even a laptop, and then not have to worry about screens and keyboards.
There are many sites that sell these, and anything older than a year needs a new battery. I've only ever heard horror stories from people with Macs, that every time something breaks or quits working you have to send the thing to a special Mac store where they keep it for 2 weeks and you have to buy special Mac cables and Mac parts... arg. So I was kinda hoping for a warrenty.
But I'm not ready to join the cult!!
Also, none of my current machines can deal with WebGL and I was kinda thinking, if I got something new enough, I could test that stuff out as well.
My current laptop/workstation isn't old enough or crappy enough to exchange for a new one, and I prefer working on Linux. So still waffling what to do about WebGL, VO and Safari testing.
Sucks that testing "free" screen readers and browsers cost like a bazillion euros more than the entire operating system I've got going now (free + cost of time of course).