I'm sorry, I'm not at all convinced of the utility of this. All these shortcuts are, it seems to me, are more limited versions of back/forward. Users already have many ways of going back or forward, and if they're interested in accelerating that, they can simply define a new hotkey for it that's whatever they please. What advantage is there in trying to create our own Wikipedia-specific system rather than (should there be a need for improvement here at all) informing users of back/forward shortcuts on their browsers so they can use them for *all* websites? This is the kind of thing that's the responsibility of the browser, not the website, to handle on a technical level, and for uniformity of experience it should remain that way.