Just wanting to clarify, Solana is not a part of the EVM group. It is different and not interchangeable like the EVM chains are. Some wallets are including both, but it's a different ecosystem.

As far as mining companies, many of them mine both Bitcoin and Bitcoin Cash as well as many also mine LTC and DOGE because they are merge mined together. But the bigger ones mainly focus on Bitcoin. Basically all the chains that are mined by ASICs are mined to an extent by publicly traded companies.

That's all... Other than that I pretty much agree with everything.