Not really.
The fact of the matter is, most of these projects came along for justifiable reasons, and represent some improvements over the existing tech: speed, ease of configuration, better dev experience, better use of platform features, and so on. I'll certainly grant that there's an aspect of chasing the new shiny here, but among the senior FE folks I know, the costs of migration are always being weighed against the actual benefits you get.
Additionally, the cost of adoption/migration is very often a high-priority concern by the people writing these libraries. The pendulum is swinging back from configuration to convention.
With regards to the pace: it mainly has to do with the fact that the Web-as-application-platform has only come into its own in the past 10-15 years or so (i.e. since the death of Flash.) The tooling is just now catching up. Another HUGE factor is the growing adoption of TypeScript- for the past several years, TypeScript tooling and existing JS build/bundle systems have gradually adapted to each other, which has driven change. (Trust me: trying to figure out how to set up TypeScript compilation under webpack was confusing and miserable for a long time.)
If you're just glancing into front-end OSS every once in awhile, or if you're not heavily using the features available in these tools, you might not notice or value these improvements. And that's perfectly OK- you can certainly continue to use whatever's comfortable for you. But there's more here than meets the eye.