totalmongobaer While I appreciate your helpfulness and I think that your suggestion would probably work, I must say "thanks, but no thanks".
Let me explain:
I got my acute scanning jobs done with an old HP Photosmart(All-In-One). Teeth on one of the gearwheels are broken, so it can't print (move paper), but scanning worked immediately.
So I had the luxury of no need to hurry with the HP ENVY 6010.
I decided to go 92%-Richard-Stallman and research how I could avoid installing proprietary software hp-plugin.
I found out that, with that device (HP Envy 6010), there's no choice but to install the proprietary hp-pluginwhen scanning via USB.
The solution was to use Wi-Fi instead.
I installed sane-airscan from the Solus repository, and things started to work. I even managed to get into the HP Envy's Embedded Web Server (EWS) with my browser, to administrate the device settings.
Success. No proprietary blobs needed! All hail RMS!
I'd like to share a great resource that I found for checking out printer/scanner compatibilities, etc., with FOSS. https://openprinting.github.io