Ok, I'm just come out and say I challenge this narrative that stylus users represent an economically insignificant portion of the market. If this were true, it would not make business sense for Apple to introduce Pencil support to so much of their existing lineup: (Apple) "If you have an Apple Pencil (1st generation), you can use it with these iPad models: iPad Air (3rd generation) iPad mini (5th generation) iPad Pro 12.9-inch (1st or 2nd generation) iPad Pro 10.5-inch iPad Pro 9.7-inch iPad (6th generation)" Since the inception of the iPad in 2010 came many of those (generally horrible) 3rd-party capacitive stylii. My guess is that Apple observed—contrary to expectation—sales and interest in these peripherals was growing, despite poor performance and spotty app support. Thus like any diligent company, they recognized a genuine market demand and adapted their product line and OS integration accordingly. Thus we getting iPad OS, pen-enabled creative apps (now rivaling their desktop counterparts), and recently Sidecar. So no, I don't buy that low market demand is preventing MS from developing their pen hardware and ecosystem. They are simply providing a sub-par pen experience relative to competition, and thus not seeing growth. MS hasn't lost the pen tablet market yet, but this backwards reasoning will certainly seal their fate.