A relatively simple question, but I am sure I'm missing details about the ETH 2.0 planned upgrades. Is there any reason to think that liquidity pool fees and the resulting APR/Y as a liquidity provider will change substantially after the upgrades?
In a nutshell, the Ethereum of tomorrow replaces the brain of Ethereum (with a sustainable and secure proof-of-stake) while keeping the body we know intact. This translates into uninterrupted contracts and applications with stable APIs and tools
The body of Ethereum, the user and application layer, will remain intact, so DeFi rewards will not be directly affected by ETH 2.0 upgrades. (If the upgrades with data shards and rollups make transactions cheaper, and lead to more deposits to DeFi, then this could cause rewards to decrease.)