Most of these are pretty spot on. The one thing I will note is that the staking rewards are not a constant 5%, they are a function of the network demand. Stakers are rewarded a portion of transactions, so the volume of demand per block will increase the gas price, and the validator rewards. If the number of validators on the network increases, each individuals rewards will drop.

That being said, the adoption of layer 2 technologies has taken off, and significantly impacted the demand for layer 1 blockspace.