Originally Posted by
CanAmSteve
That's pretty much what I suspected and confirms my wariness with "novel" bike part designs. It may look cool, weigh a gram less and offer a two-second advantage over ten miles, but come next year parts will be unobtanium.
Nothing novel about any design like this anymore, this type of design has been fairly standard for 10+ years now. For spares, Shimano are better than most for availability, cost effectiveness vs complete replacement is another thing. With Shimano max 10 years / 3 generations is about the norm for availability, being realistic, if you have parts older, they will probably be worn out by that time.