Does anybody here understand what I mean?
No I don't.
Building PCs at the lower end is slowing down purely due to the wide availability of premade systems and the move towards laptops for most users. However, building at the higher end is still stronger than ever - If you want a high performance system nowadays there is really no option other than to build it yourself or have it custom made at great expense. And even with that, I still find I get a lot of requests for home/office machines.
This is due to the work of Intel and Microsoft. The standards they have set makes it very hard to manufacture a mass-produced motherboard.
Since when? And any examples of this? When was the last time you looked at motherboards? For the latest Haswell chips, on Newegg I can find 257 different motherboards to pick from.
And future Software can not be free. It w ill always cost. Free software will not work on mass-produced motherboards.
And where is the evidence for this? I use Linux as my primary OS (that's free) and I run it on mass produced motherboards/systems. Sure Windows isn't free, and I doubt it ever will be, but that doesn't mean other free OSs won't exist.