Use 'abound in' when emphasizing the large number of something rather than its quality.

Quantity Focus

Often used to describe the richness of natural resources or wildlife in an area.

Natural Abundance

The phrase can be used in both formal and informal language without being too casual or too formal.

Use 'abound in' metaphorically to express wealth in qualities like knowledge or wisdom.

Imply a sense of admiration for someone's abundant qualities or resources without direct compliments.

Appropriate for conversational language, especially when highlighting someone's virtues or resources.