I am mainly working on B2B message exchange, e.g. via AS4/EDIFACT/ebix/CIM files and most parties seem to still work with a lot of batch processing. With the ongoing digitization of e.g. metering hardware and faster settlement times in the energy markets (EU-centric) I think this might not cut it anymore in the future.

Find out if they are moving to FIX, FIXFAST, or some sort of ITCH (binary) type feed.