Clarify what a hybrid call is and why it's bad for readers less familiar with remote

Why is this change being made?

Update language to be more clear to new readers and those less familiar with remote. It was not obvious what we meant by a "hybrid call".

Does this MR meet the acceptance criteria?

yes

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what