I've built a service that lets your create an online blog from your paper journal. I use it daily, and I find I'm a lot more consistent with journaling knowing others are reading my writing. I also write way more without all the tech distractions:
For example this image is 344KB: https://images.squarespace-cdn.com/content/v1/5f0dbd41d1d25c...
Using a basic online JPG->SVG converter ( https://tracesvg.com/uploads/1631702350_latest_part_1B_1.jpg... ) it goes to around 90KB (~4x smaller) and it should be a lot smaller with some basic curve optimizations.
While not wanting to sound too negative in this response, I didn’t even consider the file size, but rather the creative possibilities that opens up when one successfully breaks with an otherwise common format and merges it with a new one.
p.s. I've submitted it to SaaSHub as well https://www.saashub.com/paper-website