So they do it without a lock by using a "switch" instead. What is the difference? Or is it the same concept as a "lock" but they've just created a whole new con

So they do it without a lock by using a "switch" instead. What is the difference? Or is it the same concept as a "lock" but they've just created a whole new confusion around terms by trying to be different? Edit - there's an answer on the blog's comments. Apparently it differs from a lock because " it won't prevent any operations from executing, it will just properly order them"