what speeds is your ISP providing you?
Do your PCs and NAS have the capability of utilizing the higher speed ports?
Are there router settings that you want to be able to adjust that you currently can’t?
Is the only reason so that you can achieve faster connection speeds between your NAS and PCs?
getting newer hardware isn’t a bad idea. But your issue MIGHT be able to be solved by turning on some QoS settings and prioritizing the video meeting and gaming devices.