First off, it's great to see you guys and this thread here. It does pay off to get direct feedback from pro's and hobbyists, who using T&M gear daily. Sub'd to thread.
Also join 3458A support request, as this special DMM have the performance, just lack easiness of modern gear interfacing, specially on high-speed digitizing aspect of it. While supplied documentation does provide code examples and extensive details how to interface meter, it all require somewhat obsolete programming, and need to be adjusted for modern standards.
I did not study all BenchVue documentation, but is there a function to have it upload CSV/data automatically using FTP/file mechanism? For long-time (days+) experiments and data-logging it's a needed feature, when user can leave little PC running BenchVue to collect data and upload to server for realtime data access remotely. If not, it should not be very difficult to implement, given standard OS APIs, AFAIK. I used LabView for 34970A for that matter, but it's overkill for simple data gathering into CSV on network share.
One more thing. I know it's lot to ask, but perhaps in some future (v4.0?
) would be great to see BenchVue support 3rd-party DLL/scripting API to expose SCPI interface, so people can add custom functionality to support their equipment. It could possibly widen usability of BenchVue for many more people, than just Keysight instrument owners. That's what other products like NI's LabView have stronghold in, can work with anything, not limited to single brand/tool. Free hint - you can even have some section on website for users to share their setups and libraries across, just like what happening now here when someone post piece of software to interface particular tool, and others use it.