Most of my writings and artwork previous to 2017 are not online due to quality concerns, irrelevancy or redundancy, difficulty in maintenance, or changing social conditions.
Most the e-books are 3rd generation and the newest writings are 4th generation. Most graphics are 2nd generation. Each generation is a completely new creation with completely new original content expressing the same ideas but hopeful created at a higher quality. 2nd generation graphics are all completely vector based.
Most of the 3rd generation writings are books in the books section and are available to redistribute whereas the 4th generation writing mostly in the about section are released as a standard copyright and may NOT be redistributed. Check the file itself to see the exact license. If unsure, then do NOT copy or redistribute.
Most my pictures are now online in WebP format in e-books due to a combination of supporting people who have trouble seeing better, lack of support for better compression in PDFs, that my pictures look bad in JPEG format, and my ISP not allowing bigger uploads. The WebP format is unusual in an EPUB.
The sources are still completely vector, so I can still change the formats over time. Most of the graphics on the web pages are still in vector format (as you see them) and I will try to find a way to include at least a vector option in the future, if and when technology allows.