The last from Paizo on this is that they managed to get down with their "full" file sizes so much down that making "lite" versions of those would be too much work for too little gain. Also, tech goes ahead, people on general use better hardware for consuming PDFs than they did 10 years ago.
Good to know. My iPad pro still chugs along sometimes on large pdfs and my phone doesn’t have space for larger documents. I think theres still a need for smaller docs but if they are already doing what they can, fair enough :)