There is a wide range of sofas available today, that much is clear. Our society has really embraced functionality in furniture and making various kinds to suit consumers' many needs and preferences.
There are some who live in small spaces and need a sofa that is compact enough to fit in their living room. Alternatively, there are people with large families who would prefer a large, oversized sectional for their family room. There are folks who prefer their couch to be a second bed and opt for sleeper sofas, while others want a piece of furniture that reclines so they can kick their feet up while they lounge.
Sofas don't just serve functionality needs, they also appeal to style preferences as well.
There are sofas with mid-century clean lines and more ornate sofas indicative of the Victorian era. There are sofas with tufted seat cushions and those with flat cushions. And there are many different types of upholstery: fabric, suede, leather, etc.