The purpose of ABET accreditation is to ensure that students are prepared to take the fundamentals of engineering exam. Hardly any CS grads take the exam because it doesn't help you get a job. So it's not a big deal that their CS departments aren't accredited.

However, every school you listed is ABET accredited in other engineering disciplines (mechanical, chemical, civil, electrical). So ABET-accreditation is important to some fields.

It's not a huge deal, but it's not entirely trivial either.

I don't want to be too elitist, but where would you like to recruit reviewers for your computer-related patents from: DeVry Tech or Stanford? Do you really want to actively exclude Princeton and Yale grads from working on software that runs the government?

I get the appeal of having a standardized 'seal of approval', but for Computer Science, ABET is clearly not that. It looks like several other disciplines are also moving away from ABET (e.g., https://cen.acs.org/articles/95/i48/time-leave-behind-chemic...)

I've never seen a government requirement for ABET accreditation for CS degrees.

From the eligibility requirements for the patent agent exam:

Acceptable Computer Science degrees must be accredited by the Computer Science Accreditation Commission (CSAC) of the Computing Sciences Accreditation Board (CSAB), or by the Computing Accreditation Commission (CAC) of the Accreditation Board for Engineering and Technology (ABET), on or before the date the degree was awarded. Computer science degrees that are accredited may be found on the Internet (http://www.abet.org).

[page 6 of this pdf: https://www.uspto.gov/sites/default/files/documents/OED_GRB....]

A lot of fed jobs have engineering-centric requirements. This one, for example, wants an accredited degree or experience under a PE....to do network management. https://www.usajobs.gov/GetJob/ViewDetails/525193800