This is interesting because every Next/React project I see has a slower velocity than the median Rails/Django product 15 years ago. They’re just as busy, but pushing so much complexity around means any productivity savings is cancelled out by maintenance and how much harder state management and security are. Theoretically performance is the justification for this but the multi-second page load times are unconvincing.
From my perspective, it really supports the criticism about culture in our field: none of this is magic, we can measure things like page-weight, response times, or time to complete common tasks (either for developers or our users), but so much of it is driven by what’s in vogue now rather than data.