General Fusion's approach seems pretty realistically commercializable. They're struggling to get any funding though, probably a symptom of being in Canada.

Not only that, but fusion itself is absolutely not what a tech venture capitalist wants to fund. The research horizon for fusion power is in the multiple decades. You're never going to find an investor that says "Yeah, I'll give you enough money to build a fusion reactor and do research for 20+ years in the hopes that you get something workable"

Fusion is literally still in the pure science stage that OP was telling governments to stick too.