[marbu]

I wonder whether there are some new developments in digital archeology here which makes the source complete enough for one to be able to compile it (assuming one has access to a NeXT machine with its app builder from early 1990s).

I recall when people working on recreation of WWW in 2019 were not able to compile the code: https://worldwideweb.cern.ch/code/

[lioeters]

The InfiniteMac project runs emulations of NeXT machines in the browser. This one has WorldWideWeb.app version 1.0.

https://infinitemac.org/1991/NeXTStep%202.1

So a determined researcher might be able to compile it from source.