And as you would expect, it can’t be worth Shimano developing a whole different clutch mechanism for SLX, XT and XTR.
Very true but they do seem to have a habit of removing features or using much cheaper/inferior materials on the cheaper stuff.
Actually, I’m thinking the other way. There seems very little to differentiate between Deore/SLX/XT/XTR these days, just a colour difference here, and a bit of steel versus aluminium versus carbon there. All have (or are getting) the latest technolohgy like servo-wave brakes, shadow plus mechs, hollow axles. And if you go down to the level of parts diagrams you start to find a lot of common bits – the SLX and XT brakes are near identical for example.
Makes sense for Shimano, as design, manufacturing, and stocking must be easier, especially these days when it seems the industry (and us consumers) demand a brand new model every year! However, leaves very few real points of differentiation between the different model lines, as the endless debates on here about whether XT is better than SLX, Saint than Zee, just go to show!