Inquiry: Web3j Android Usage and Challenges Faced

Hello AlphaWallet contributors and maintainers,
I noticed that AlphaWallet previously used Web3j Android. We are currently working on integrating the latest release of Web3j and would appreciate your insights. Could you kindly share any challenges or issues encountered with Web3j Android during its usage? Additionally, if the project has stopped using it, could you explain the reasons behind that decision? This information will help guide our efforts in the current integration.

Thank you for your support!