The failure mode
Enquiries land on three portals, an office phone and two personal WhatsApp numbers. Whoever sees one first answers it, or assumes someone else has. Nothing is scored, nothing is assigned, and nothing is recorded against a client until a deal is close enough to matter.
The brokerage then buys a CRM, agents do not update it because it adds work without giving anything back, and within a quarter the CRM is a slower version of the spreadsheet it replaced.