can I access Roku data as used to be provided by ECP queries like '/query/apps' and '/query/active-app' via the Roku's USB port?
I'm not sure what you're asking here. Are you saying that previously you could access the data via the USB port and you can't now? If so, I didn't know that was ever possible. If you're asking if there's anyway to access it now
via the USB port, I'd have to ask why would you want that? The only way I know of to access the data is via TCP on port 8060 (e.g., http://
<device IP>:8060/query/apps). Surely you can access it that way, no?