The private, for-profit results are already bad. The formatting is uniformally terrible, the writing is hit and miss. I like some of the open stuff as it is web formatted as opposed to paper formatting, which is the same motif that digitized textbooks use, which is both absurd and frustrating, not to mention DRM readers with shit functionality and bad or absent in-text linking and zero interactivity. It just paints "RENT SEEKING" all over the industry as a whole. However there are some publishers that make nice barebones texts and offer them in unlocked pdfs at economical rates, a real godsend.

The people I really appreciate are the pedagogues on YouTube who make world-class materials for "free". Shout out to Dennis Davis:

https://m.youtube.com/@DennisDavisEdu