Most wallets use deterministic keychains and mask the generation of new addresses from the user making it easy and safe to maintain privacy.
Address re-use can impact user privacy, allowing anyone who sends or receives money to or from a particular address to see all of the transactions it is part of.
Security is also a concern as a thief only needs to gain access to a single key in order to compromise a wallet.
This content is based on content sourced from https://en.bitcoin.it/wiki/Address_reuse under Creative Commons Attribution 3.0. Although it may have been extensively revised and updated, we acknowledge the original authors.