What are the disadvantages of selling concept?

Well, honey, selling concept is great if you're living in the Stone Age. But let's get real - focusing solely on selling without considering customer needs and wants is a one-way ticket to irrelevance. It's like trying to sell ice to an Eskimo - it just ain't gonna work in today's savvy market. So, if you wanna stay in the game, better ditch that outdated mindset and start putting your customers first.