Per the discussion in https://jira.mongodb.org/browse/MONGOID-4860, it is indeed somewhat awkward to write:

Foo.and(Foo.or(condition1, condition2))

We should investigate repurposing any_of to achieve this without the and, as follows:

Foo.any_of(condition1, condition2)

Such that the following expresses that condition 1 must be true or either of conditions 2 and 3 must be true:

Foo.where(condition1).any_of(condition2, condition3)

If Mongoid 7.0 behaves in this manner, I think it would be helpful for Mongoid 7.1.1 to reinstate this behavior of any_of, and leave `or` behave as it currently does in 7.1.0.