The rulebook covering how much storage, bandwidth, and server power your plan gets has been replaced. The old one was called the "Unlimited Policy"; the new one is the "Resource Allocation Policy." That name change hints that limits may be described differently than before, but the new policy's actual text isn't part of this change, so there's no way to tell from here whether your limits got tighter, looser, or stayed the same. Because it's incorporated into the Terms, you're bound by it either way.
“3. [Resource Allocation Policy](https://www.dreamhost.com/legal/resource-allocation-policy/)”
What you can do — Read the new policy at https://www.dreamhost.com/legal/resource-allocation-policy/ and compare it to your plan's advertised limits. If your usage is near any stated cap, contact DreamHost support to confirm what applies to your account.