Lyft delivered solid milestones in 2025, but 2026 will be the real test of the sustainability of its achievements.Lyft (LYFT 0.73%) enters 2026 in a stronger position than it has seen in years.After a long period defined by market-share pressure, cash burn, and questions about long-term viability, the company finally delivered consistent profitability, expanded internationally through the Freenow acquisition, and tightened its operations.But 2026 won't be about declaring victory; it will be about validating ...