I still like the framework, but it probably targets a more specific segment of the market. I think aleph.js[1] is more like next and then there is the esoteric ultra.js[2] which kind of tries to do something similar and be super bleeding edge.
[0] https://github.com/denoland/fresh/issues/403#issuecomment-11... [1] https://github.com/alephjs/aleph.js [2] https://ultrajs.dev/docs
So now there's a React hook (useDeno) that takes a callback that is only executed on the server-side, and the returned value is sent back to the client side transparently.
As for the NextJS; there are also a projects that try to mimic its API like AlephJS [3] and Fresh [4].
[0] https://github.com/oakserver/oak [1] https://github.com/asos-craigmorten/opine [2] https://github.com/drashland/deno-drash [3] https://github.com/alephjs/aleph.js [4] https://github.com/lucacasonato/fresh