By the way, that process is vise versa to what most of other crypto projects are doing. That may be even a single case. At least, I don't know other examples in crypto when a whitepaper was created only after a software is ready for production.
other projects aren't really writing any "whitepaper" though. they have changed the meaning of it too. it is currently used as a way of advertising the useless token they are trying to sell by giving vague information and only false promises. and sometimes even create and solve imaginary problems in one place!
that's 99% of the cases.