Dropbox Inc. ( DBX ) delivered a solid fourth-quarter performance, surpassing Wall Street expectations. The cloud storage and e-signature company reported revenue of $643.6 million, a 1.4% increase year over year, beating analysts’ estimates of $639 million. Adjusted earnings per share (EPS) of $0.73 also outperformed expectations by 16.8%, marking another quarter of strong bottom-line execution. However, despite these positive results, Dropbox faces mounting revenue growth concerns. Its operating margin declined sharply to 13.7% from 42.1% in the same quarter last year, while free cash flow margin dropped to 32.7% from 42.3% in the previous quarter. The company also reported a slight sequential decline in paying customers, with 18.22 million users at the end of the quarter, down from 18.24 million in Q3. Strategic Shifts and Market Challenges Dropbox’s recent decision to retain FormSwift, its document-generation application, has raised concerns among investors. While the company chose...