No, they still want to move quick, and you can do that by relying on the change signaling of your vendor: if you know the vendor is trustworthy, you can deploy

No, they still want to move quick, and you can do that by relying on the change signaling of your vendor: if you know the vendor is trustworthy, you can deploy minor updates with only minimal testing. If the vendor is unreliable or doesn't signal their changes accurately, every "minor" update becomes a liability, and that's where it gets slow. Companies that want to move quickly should not use unreliable vendors.