We IT folk should find another word for disorder that increases over time, specially when that disorder has human factors (number of contributors, number of users, etc). It clearly cannot be treated in the same way as in chemistry.
The part of thr article on information theory is more about mathematics than software. I don't deny there could be some generalization there.
The problem I see is that this could slip to measure human actions, which are also source of uncertainty, but although the words fit, in this particular case I think associating it with classical entropy does more harm than good.
https://en.m.wikipedia.org/wiki/Software_rot
Entropy as described in this article (software entropy), to me, does not fall under the same generalization. It is a looser use of the word. I used it myself several times, but now people are buzzwording entropy all around, and I think that looser use should be retracted to avoid thinking of humans as numbers or particles.
To whit, "contract entropy": how many different ways can a contractor technically fulfill the terms of the contract, and thus get paid? If your contract has high entropy, then there's a high probability that you'll pay your contractor to not actually achieve what you wanted.
Even in physics itself, the word "mass" has multiple contexts (inertial, gravitational, and conversion to energy) in which it is used. Einstein made quite a lot of hay out of relating the three. "Entropy," too, has multiple contexts.
The second thing possibly tripping you up is the tendency for scientific terms to be poorly appropriated into a new context, like "theory." You can fight this but it is a losing battle, so I typically just try to set it aside.