For which type of mission are sacrificial ablative shields generally considered ideal?

Answer

One-time missions, such as deep space sample return capsules.

Ablative systems are designed to burn away, making them unsuitable for reuse. They are preferred when mass efficiency for a single return trip is the highest priority.

For which type of mission are sacrificial ablative shields generally considered ideal?
Aerospaceaeronauticsheat shieldthermal protection systemreentry vehicle