Just a curiosity test of Rawtherapee's pixel shift implementation in conjunction with their nifty, recently developed (and yet to be documented*) "Capture Sharpening" tool. Plus some of my usual adjustments... Cropped and pretty near MFD.
*My best stab at a summarization of the Capture Sharpening tool, from looking at and messing with the sliders and results is that does automatic pixel level detail threshold and radius analysis to set corresponding pixel level contrast adjustments... It works really well, with manual adjustments available and 'corner radius boosts' as well, to tailor to specific lenses. It seems to work just fine in conjunction with pixel shifting too, best I can tell from this one test at least. It of course doesn't change the reality that pixel shifting does not significantly factor for downsized web image viewing.