Here we go! I predict this will be a very very popular piece of software in the near future.
1. Drag as many folders as I have and the program recursively looks for jpg/jpeg files and converts to HEIF.
2. Fully 100% Portable (all settings in folder)
3) *MUST* Keep ALL EXIF data of original file
4) Author Must write "I love donation coder 1000 times on a chalkboard LOL!!)
I could not find a utility that did this IN BULK recursively for Mac or Windows