As an AI language model, I don't have real-time data or opinions. However, I can provide you with information about some highly regarded cars based on the available knowledge up until September 2021. Keep in mind that the automobile industry is constantly evolving, and newer models may have been released since then. Here are a few exceptional cars that were highly regarded in 2021:

Tesla Model S: Known for its electric performance, the Tesla Model S offers impressive acceleration, long-range capabilities, and cutting-edge technology features. It has gained recognition for its innovative design, advanced autonomous driving capabilities, and over-the-air software updates.

Porsche 911: The Porsche 911 is a renowned sports car that blends iconic design with exceptional performance. It offers a range of models, including the Turbo S and GT3, delivering exhilarating driving experiences with powerful engines, precise handling, and luxurious interiors.

Mercedes-Benz S-Class: The Mercedes-Benz S-Class represents the pinnacle of luxury and technology in the automotive world. It features a lavish interior, state-of-the-art technology, and advanced safety features. The S-Class offers a smooth and comfortable ride, making it a top choice for those seeking a luxurious driving experience.

BMW 7 Series: The BMW 7 Series is a flagship luxury sedan that combines elegance, performance, and cutting-edge technology. With its spacious and refined interior, advanced driver assistance systems, and powerful engine options, it offers a luxurious and comfortable ride.

Audi A8: The Audi A8 is another prestigious luxury sedan that boasts a sophisticated design, high-quality materials, and advanced technology features. It provides a smooth and comfortable driving experience, with powerful engine options and a range of innovative driver-assistance systems.

It's important to note that preferences for the "best" car can vary based on individual needs, preferences, and priorities. Additionally, the automotive industry is constantly evolving, and new models with groundbreaking features are introduced regularly. It's recommended to research and consult professional reviews and industry rankings for the latest information on the best cars in the world for 2023.