The hidden cost of fragmentation
One tool for tasks, another for billing, another for documents, another for communication, each one seems reasonable on its own. Together, they mean scattered information and time lost figuring out which tool has what you're looking for.
What you gain when it's all linked
When the client, projects, invoices and documents live in the same place, you open a client and see the whole context at once, without navigating between four different apps.
It doesn't mean fewer features
Consolidation doesn't mean giving up functionality, it means no longer paying the context-switching cost between tools that don't talk to each other.
Bottom line
One place for everything isn't just convenience, it's less time lost looking for information that should already be where you expect it to be.