Things start getting tough when you have to manage gas fee everytime for deploying Chainlink keepers and VRF subscriptions. Need for account abstraction while developing on chainlink:

Gas Fees: Gas fees can be a significant barrier for developers, especially when conducting frequent transactions or executing smart contracts.

Complexity of Token Management: Managing Ethereum and other tokens for subscriptions and keepers manually can be cumbersome and error-prone.

Onboarding Difficulty: Blockchain development can have a steep learning curve, and concerns like gas fees can deter newcomers.

So, we have used Pimlico to create a smooth experience for developers while building on Chainlink.