Lockup periods aren't really inherent to PoS though. In Eth2 exits are rate limited, but they should be quick under normal conditions, and only delayed (for sec

Lockup periods aren't really inherent to PoS though. In Eth2 exits are rate limited, but they should be quick under normal conditions, and only delayed (for security reasons) if many stakers try to exit at once. For even greater liquidity, one can use a paltform like Lido, and just sell stETH at any time.