We don't see the same level of agitation over Apple because the topic has been done to death; Apple is a hardware vendor who happens to write the embedded OS for it's hardware products. They do the complete package. Apple's hardware being locked down to Apple's embedded software also does not affect the wider general purpose harware market.
Microsoft is a software vendor who makes demands of third party hardware manufacturers to include arbitrary limitations (there is no reason other OS can't run on ARM and indeed already run very well on the processor platform). Microsoft also has a very real ability to harm the market by having general purpose hardware limited to a single software OS brand.
If MIcrosoft make's it's own hardware and an embedded OS for it then all the power too them.
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