This weekend I picked up the 2020 version of The Next Exit for an extremely reduced price. I only skimmed through the Texas section and noticed:
There is not a section for I-69, I-69E, I-69C, I-69W, I-2 or I-14 despite all of these interstates being several years old.
If you want to say these are not real interstates, I'll go with that, but there is also no section for I-635 or I-820 despite there being one for I-410 and I-610.
I haven't really gotten into the rest of the book, but I am sure there are some other strange omissions in other states.