Seems like a rewrite for the sake of a rewrite. New frameworks are exciting but if you're building a product you have to realize that's not important to your customers.
Sure if you were on PHP, a rewrite to a JS framework would be worth it, because you could deliver features to your customers faster, less bugs, etc. But once you're in the JS ecosystem, it gets much harder to justify a lateral migration like that. Like what features have they actually picked up as a result of the migration? Or are they just doing it so they can work on flashy new framework? I'm going to guess the latter.
Sure if you were on PHP, a rewrite to a JS framework would be worth it, because you could deliver features to your customers faster, less bugs, etc. But once you're in the JS ecosystem, it gets much harder to justify a lateral migration like that. Like what features have they actually picked up as a result of the migration? Or are they just doing it so they can work on flashy new framework? I'm going to guess the latter.