The "a" models haven't been 300€ for a good while now. Launch price for 9a was 549€. So I would set that as the floor price for any speculation about this.

Well you don't have to buy on launch date. I bought both the 6a and th 8a six months after release and they both were 300-ish

9pro was like 1300€ on launch, it's already 900-ish

Sure but that's not relevant when talking about "will be priced like Pixels".

Sadly, I believe that only 1000€+ models are meant here.

Knowing that OnePlus has been the most friendly for alternative OSes, I believe that the newer OnePlus Phones will get GrapheneOS builds.

It's hard to believe that Samsung, Huawei or Xiaomi are going to partner with them.