RISC-V may not change everything, but I do believe that it will change on thing in a major way: the financials of CPU IP such as Tensilica, Cortex-M0, ARC etc.
There is very little friction in replacing embedded controllers that are not customer facing. And that's a market were $0.01 in licensing fees can be a big deal.
Edit: in the maker world, the so-called Blue Pill is incredibly popular. It has an STM32F103 SOC with a 72MHz Cortex M3 and tons of digital and analog interfaces. On AliExpress, these boards go for $1.60 a piece!
Reminds me of USB vs Firewire. Firewire was the superior of the two yet it lost. Why? USB didn't have Fw's $0.25 licensing fee per manufactured device.
I don't know who was supposed to pay the $0.25, but gizmos like external hard drives is a commodity market with razor thin gross margins.
Whoever decided that $0.25 was reasonable for that kind of market (Apple?) essentially killed the protocol right there.
Edit: here's the story: https://arstechnica.com/gadgets/2017/06/the-rise-and-fall-of...
Steve Jobs changed royalty model from a flat licensing fee to a $1 fee per port (insane!), Intel walked away and cancelled all FireWire development, Jobs lowered it then to $0.25 but Intel didn't come back.
Probably still a good idea to have a lawyer read things over...
For those in the dark still, it stems from this scene: https://youtu.be/wPrUmViN_5c