An IT services deal is a long conversation with six different people
The deal does not belong to a contact, it belongs to an account
Selling implementation, integration or managed services is nothing like selling a product. A single opportunity involves a technical evaluator who cares about architecture, a budget holder who cares about the number, procurement who cares about terms, an internal champion who wants the problem solved, and often an existing vendor defending the account. Each has a different objection and a different timeline.
When all of that lives in one salesperson's inbox, the deal is one resignation or one internal reshuffle away from restarting. Recording stakeholders as contacts with roles, and keeping every proposal, meeting note and message on the account, means a new champion can be brought up to speed in a day rather than a quarter. In a cycle this long, that resilience is worth more than any reporting feature.