nice-to-have

noun1

1. •
   (informal) A feature that a product or service being designed would ideally have, though it may be impractical at present.

   • There's a huge gulf between “must-have” and “nice-to-have” products. If you sell a nice-to-have product, no one, not even your best friends, will use it long term. We all focus on must-haves. — 2021