I missed the specific commands to enable GPU acceleration, and when I noticed and tried them, it made a HUGE improvement! (words... slowly... typing... to a very-reasonable-reading-speed generation on a 2017 GPU)

... what is that 35? Should I try larger numbers until it breaks?

Or, alternatively, a "noob" mode feature request of "If I don't specify anything, try some reasonable defaults depending on what hardware is available"