Why not just extend Salesforce for professional services account management after the sale?
Because Salesforce was shaped for the new-client sales motion that ends at the signed engagement letter. The post-engagement rhythm is a different shape: a monthly realization check, an engagement letter renewal clock on a 6-to-24-month cycle, quarterly client reviews, cross-service signals surfacing in offhand comments across three practices, and a referral ask on the warm moment. You can bolt a few custom objects on and some firms do, but the result is a contact view the AM lives in while realization still lives in Dynamics and the engagement letter dates still live in a spreadsheet on a partner secretary desktop. Strkr treats the AM motion as a first-class surface with its own objects and its own pipeline, on the same record the business development partner closed on, so the handoff seam disappears without a second platform.