Somebody needs to tell him that the plural of CPU is "CPUs", not "CPU's" :-). I am afraid that even more people will start overusing apostrophes.
The general newspaper style is acronyms with periods use apostrophe to separate period from s. Therefore M.D.'s and Ph.D.'s are plural. Where period is not used in the acronym, the apostrophe is not used, so CPU not C.P.U., therefore it's CPUs. Anyway, it's just a convention, the key is consistency.
No, it's not the “technically correct way”. It's true that some style guides recommend something like this (but always, AFAIK, more limited); e.g., the New York Times style (and Chicago style) uses apostrophes for plurals of abbreviatiins formed with capital letters and periods, and plurals of single letters. [0] AP, on the other hand, only uses apostrophes for plurals of single letters, but not for abbreviations/initialisms/acronyms. Most British styles I've seen don't use apostrophes for plurals at all, IIRC.
[0] https://afterdeadline.blogs.nytimes.com/2010/04/13/faqs-on-s...