I think you're right - but only in so much as the M9 is one of the only cameras of the era that people are so insanely wedded to. How many other digital cameras from 2009 are still selling for four figures and being waxed lyrical about on the internet? I don't know anyone still using a Nikon D3S or the Canon EOS-1D Mark IV, personally.
Eventually, all things fail - entropy is a bitch like that. It's not if, it's when. The time scale in question might not be relevant to you or me, but your chosen/most beloved camera/car/tool/toy will fail at some point. And as devices get more complex, the components more specialised, the facilities to manufacture them more expensive... the less likely we'll be able to keep them going.
For comparison, I picked up a 1970s record player from a second-hand store back in 2013. It needed a new stylus and a new drive belt for the turntable, and then it was as good as new, and is still running fine today. Simple components, easily sourced. On the other hand, I've lost count of the amount of CD players I've owned since the 90s that have basically had to go to landfill due to failed laser units that weren't user-replaceable as they weren't standardised and easily-sourced parts.
Which reminds me, I've got a dead iPod upstairs that I keep meaning to repair...