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1
AFAIK image rotation is still needed in 2020 in browsers but jpegtran does the job quite as well as exiftran. jpegtran keeps all tags as long as the "-copy all" option is used, which is not brand new: it has been possible since version 6b of libjpeg, released 27 March 1998. If you always require tag/marker conservation, you can use an alias:
alias ...
2
I had complete mess with file dates in my library, but was not satisfied with any of the tools. Some support no directory recursion, some cannot modify some windows-specific timestamps, some are difficult to use.
I made a new command-line tool for single task - recursively process all files in given directory to extract EXIF date and set file date to it.
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