The stage of life before adulthood during which a new trend of children staying home longer is becoming common is referred to as

This stage is referred to as adultolescents.

Explanation:

Adultolescent is the product of the words adult and adolescent. This means an adultolescent individual has characteristics from both stages of life.

This stage is characterized by a lack of desire or hope in gaining independence, wether financial or living on their own for example. It is becoming a much more common trend amongst individuals.

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