People buy new cars when they don't need them for various reasons, which can be explained in several points:

Status and Prestige: Many individuals view owning a new car as a symbol of success and social status. A new car can signal to others that they are financially secure or have achieved a certain level of success in life.

Peer Pressure: Social pressure and the desire to fit in with peers and colleagues can push people to buy new cars even when their current vehicles are still functional. They may feel the need to keep up with the latest trends and models.

Marketing and Advertising: Car manufacturers invest heavily in advertising and marketing, often creating a sense of desire for the latest models. These campaigns can make people believe that they need a new car, even if their current one is perfectly serviceable.

Emotional Attachment: People can develop strong emotional attachments to cars. They may buy new cars not because they need them but because they have a sentimental connection to a particular brand or model.

Technology and Features: New cars often come equipped with advanced technology, safety features, and entertainment systems. People may buy new cars to take advantage of these innovations, even if their old car still functions well.

Warranty and Reliability: New cars typically come with warranties that cover maintenance and repairs for a certain period. Some individuals prefer the peace of mind that comes with a new car's reliability and warranty, even if their old car is still running smoothly.

Fuel Efficiency: With concerns about rising fuel costs and environmental consciousness, people may opt for newer, more fuel-efficient models to save on fuel expenses and reduce their carbon footprint.

Convenience: New cars often have the latest conveniences and creature comforts. Some individuals may buy new cars for the added convenience and comfort they offer.

Leasing and Financing Options: Easy access to car financing and leasing options can make it more attractive for people to acquire new vehicles, spreading the cost over time. This can make new cars seem more affordable than they actually are.

Trade-In Incentives: Dealerships and manufacturers often offer trade-in incentives, making it financially appealing to upgrade to a new car. These incentives can lower the cost of purchasing a new vehicle.

Tax Incentives: In some regions, there are tax benefits for purchasing new, fuel-efficient, or electric vehicles. This can motivate people to buy new cars, even if they don't necessarily need them.

Safety Concerns: Newer cars often have better safety features, which can be a significant motivating factor for individuals who want to ensure their safety and their families while on the road.

Personal Preferences: Ultimately, personal preferences play a significant role. Some individuals simply enjoy the experience of driving a new car, the smell of a new vehicle, and the feeling of being the first owner.

It's important to note that the decision to buy a new car when it's not strictly necessary can be influenced by a combination of these factors and can vary from person to person.