I'm not particularly expert on this, but it seems like RISC-V is ramping up pretty quickly. Presumably an advantage to customers would be that they ideally wouldn't have any vendor lock-in (they could easily switch to a different RISC-V vendor, or even start manufacturing RISC-V chips themselves). They could also customize the ISA with extensions if they had an application for that (although it seems quite conceivable that that's a possibility with ARM too in some way; I don't really know).

I realize that just having a lot of RISC-V hardware options available isn't a guarantee that they're particularly good in terms of their price-power consumption-performance tradeoffs, especially in comparison to ARM (the "whole universe of high-quality hardware designs" that you mention). That may well have more of a delay.