What replaces SD-WAN?

Could you elaborate on what technology or approach is emerging as a potential replacement for SD-WAN, given its current dominance in the networking landscape? Are there any notable advancements or innovations that are being considered as viable alternatives, and how do they compare in terms of performance, scalability, and cost-effectiveness? Additionally, what factors are driving the need for such a replacement, and what challenges might organizations face in transitioning from SD-WAN to this new technology?