Eth 2.0 will be fully PoS (released fully in the next year or two, but staking is possible now).
Cardano, Cosmos, Polkadot are a few protocols that are PoS but are still very early in their development.
> "we're what, over a decade in to the history of cryptocurrency"
I would argue that's not long at all. The internet was technically invented in the 1960s (ARPANET) and TCP/IP went global in the early 1980s. Took a while for things to get to where we are now.
Cardano, Cosmos, Polkadot are a few protocols that are PoS but are still very early in their development.
> "we're what, over a decade in to the history of cryptocurrency"
I would argue that's not long at all. The internet was technically invented in the 1960s (ARPANET) and TCP/IP went global in the early 1980s. Took a while for things to get to where we are now.