Support layer style definitions based on SLD-Files (Styled Layer Descriptor | OGC ) - Load AND Save. It would improve interop. with other tools and software and data from organisations like European Environment Agency.
I'm sure there are big difficulties trying to convert all the intricate stuff you can do in ESRI symbology to the SLD format. Probably impossible. However, I still want it
@KoryKramer is this something ESRI will consider (like yesterday), there are thousands of views and when combined with the other idea over 100 votes!
Large organisations such as the FAO all want to use geonetwork\geonode and they want data with SLD style files. ArcPro should really be able to export ESRI layer styles and read SLD. To not be able to read/export SLD is simply pushing everyone towards QGIS...