it's not accurate to say that all tabletop microwaves are produced by a single company. The microwave oven market is highly competitive, and numerous companies manufacture tabletop microwaves for consumers.
Companies like Panasonic, Samsung, LG, Whirlpool, Sharp, Toshiba, and many others are well-known manufacturers of tabletop microwaves. Each company offers a variety of models with different features, sizes, and price ranges to cater to various consumer needs and preferences.
The popularity and widespread use of microwaves have led to a diverse market with various brands competing to offer the best products to consumers. The availability of numerous brands and models allows consumers to choose the one that best suits their requirements in terms of functionality, design, size, and price.
It's worth noting that market dynamics can change over time, and new players may enter the market or some companies might merge or exit the industry. So, it's always a good idea to check the current market status and product offerings when considering purchasing a tabletop microwave.