I can say with certainty I will be using Freeroute until I can achieve the same level of efficiency on a quick interface board using the v5 autorouter. IIUC, the v5 auto-router is computer-assisted and requires a human to select or determine (or accept) route options provided by the v5 auto-router. Do I understand correctly? I'm a newb designing my own PCBs and I haven't been following v5 autorouter news in detail, is the basic v5 routing workflow described somewhere?
So long as the v7 spectra-format-autorouter export and session import continue to be supported I am satisfied, and understand the argument for removing direct support. I don't have an issue so long as I can continue to get into and out-of a stand-alone auto-router (i.e. freeroute).
Freeroute appears to be being maintained as part of the commercial proprietary "LayoutEditor" tool suite (http://www.layouteditor.net/), which at first glance appears to be similar to KiCAD but targeted very specifically at multi-chip-on-substrate-type modules. There's a manual for Freeroute available at https://freerouting.org/ and it has a page for KiCAD. FBOW, the recommended install procedure for Freeroute is to install the free version of LayoutEditor (i.e. what you get if you don't purchase a license key). The installer doesn't create a menu selection for freeroute, and you have to browse the install bin directory for the executable and create a desktop short-cut (or copy the jar file to the appropriate kicad/... directory and rename, but that reportedly won't work in v5 because the menu/button will be gone).
I am somewhat concerned that I couldn't find a link to the freeroute source on the layouteditor site, but they are claiming GPL so I won't complain so long as they continue to provide Windows binaries for updates. I'm also pragmatic.