PKCS12 is a standard file format for storing keys and certs that is widely used by PKI applications. It has been available in the JDK for more than 15 years.
The default PKCS12 algorithms for confidentiality and integrity currently make use of SHA-1 hashes. SHA-1 is no longer universally recommended. We should examine supporting alternative algorithms that are stronger and that make use of SHA-2 hashes.
Interoperability concerns will also need to be examined before upgrading the default algorithms.