The difference in popularity is more like 40x, which makes your theory obviously correct, and it also makes it a no-brainer for the devs. The server-side aspect

The difference in popularity is more like 40x, which makes your theory obviously correct, and it also makes it a no-brainer for the devs. The server-side aspect is opt-in and someone currently using react router v6 (with v7 future flags on) will not need to make any code changes when upgrading to v7. How could a new server magically appear in your application?