How many ad groups is too many?

Security principals (that is, user, group, and computer accounts) can be members of a maximum of approximately 1,015 groups. This limitation is due to the size limit for the access token that is created for each security principal. The limitation is not affected by how the groups may or may not be nested.

For More Information Please Refer: https://community.spiceworks.com/topic/260512-can-you-have-too-many-ad-security-groups