Yes, airlines do stop making certain planes. The aviation industry is dynamic, and aircraft manufacturers continually evolve their product lines to meet changing market demands, technological advancements, and regulatory requirements. As a result, older aircraft models may be phased out or discontinued over time. Several factors contribute to the decision to stop production of a particular aircraft:

1. Technological Obsolescence: Newer aircraft models often incorporate advanced technologies, improved fuel efficiency, enhanced passenger comfort, and better performance compared to their predecessors. As technology progresses, older aircraft may become less competitive, leading manufacturers to focus on developing and producing newer, more efficient models.
2. Market Demand: Airlines’ needs and preferences evolve, driven by factors such as changing passenger demands, evolving route networks, and economic considerations. If there is limited demand for a particular aircraft model, manufacturers may discontinue its production to focus on more in-demand aircraft types.
3. Regulatory Requirements: Aviation regulations and safety standards change over time. If an aircraft model no longer meets the evolving regulatory requirements, manufacturers may choose to cease production to prioritize compliance with new standards.
4. Production Costs: Manufacturing aircraft involves significant investments in production facilities, supply chains, and research and development. If the production costs of a particular aircraft model become uneconomical or if the return on investment is not sufficient, manufacturers may halt production.

It’s important to note that the retirement of an aircraft model does not immediately render existing planes obsolete. Airlines often continue to operate retired aircraft for many years, and maintenance and support services are typically available. Additionally, aircraft manufacturers usually provide ongoing support for spare parts, maintenance, and upgrades for a certain period even after production has ceased.

When airlines require new planes to replace older models or expand their fleet, they typically turn to the available options from manufacturers, considering the latest offerings that meet their operational requirements and business strategies.