I don't think it has ever been the case that you could neglect soft skills. You will hear this over and over, in every area of every business: people become successful by adjusting their behaviour to what works for the business. Sometimes this is called being a slick politician, sometimes it is called avoiding getting bogged down in politics. But it's never been the case that a dev could just focus on technical thing…
At the same time, if you're very good at what you do, soft skills are a lot less important. Most of my peers would rather work with brilliant jerk than a friendly average person.
But most people are not brilliant, and then you can't afford to not have soft skills.