People once made requests for hybrid cloud because of the perception of flexibility. Now they make multicloud requests, for the same reasons. Multicloud is just part of a cloud architecture that uses more than two clouds, private and/or public. However, most multicloud deployments involve more than two public clouds, typically AWS, Microsoft, and sometimes one other, such as Google.
Although the concept of having “pluggable clouds” is not at all new, I get more and more inquiries about multicloud patterns that promote the notion of pluggable clouds.