The only catch will be if attention coalesces around an individual project instead of hundreds of people vibecoding their own versions.
These are decades-old software where even the inconsistencies, quirks and bugs are now considered features (because users have come to rely upon them) - a full detailed specification itself would be very complicated. My bet is this OSS-clone hype will last all of 6 months.
My bet is: This guy is pumping out that stuff to land a good job somewhere :-) (I doubt that by now someone is paying for the continuously crashing clones?)
Their websites look more polished than the apps themselves, have download options for non-technical users, and in no place that I can see (as of writing) do they mention that they are early development: https://getartcraft.com/apps/wordcraft
In "the before times" it was at least the norm to place at the top of a github repo and download section "this is early alpha" or similar to not let down potential users. This project currently seems like a great way to burn user willingness to try new apps.