There are pros and cons for both, it depends on personal choice and budget.

Most modern or minimalist kitchens have built-in cooking appliances as part of the design. They offer space-saving benefits and a sleek, seamless appearance, yet they do tend to be more expensive to both buy and repair. Plus they are permanently installed in the kitchen so can’t be relocated.

Free-standing appliances are better suited to a more traditional or industrial kitchen design. These appliances require more floor space, but are generally more affordable and easy to install. Access for repairs is simple and if you move, you can take your favourite kitchen appliances with you.

There is no easy answer as people are motivated by different things.

A brand promotion with cost-savings may prompt a purchaser to buy only that brand’s appliances. One brand may have a particular type of refrigerator, another offers certain multi-function oven or freestanding cooker with must have gas cooktop features, or there’s a type of dishwasher required to upgrade your dishwashing game, so the discerning buyer may choose to mix and match.

If opting for integrated or built-in appliances, different brand choices don't matter from a design perspective as many of the appliances will be hidden within kitchen cabinetry. With free-standing appliances, the look of different brands is more obvious particularly the stainless steel finishes or handle styles, so check these out before you buy.