Answering you and Hydraulix989:

Because Internet forums. That's why. Search for "I can't install Windows 10 on my Lenovo Whatsyourface" and you'll get "Change this super secret setting to AHCI". And who's going to be doing those searches? Everyone, but specially people less computer savvy. The ones that know enough are here discussing Lenovo's decision.

Again, just to clarify: I'm not trying to defend Lenovo. What they did was a bad business decision, but maybe it was the lesser of two evils. Maybe they should've kept Intel accountable on this one - but who can argue with the only serious CPU manufacturer for laptops?

Every other chipset and motherboard in existence has had that option and it hasn't affected anyone adversely. There is no less of two evils. There isn't any evils here.

That's not what the article claims. Apparently there are indeed two evils here:

Lower performance for everyone or no drivers for Linux.

I take you know more than the article's author, in which case I'd be interested in reading your analysis as I'm not an expert.

There is no way that using a fake RAID set of drivers and a completely incompatible and more complex on-disk RAID format is going to increase performance in any way.

There's a reason why that hasn't been done on any system in the past - because it's stupid and fake RAID drivers are notoriously buggy and require support from cloning and other low level software that gets used.

Yer, you're not an expert, or appear to know anything about hardware.