I had to finish a shave with a cartridge blade today. First time in several months.
Early this morning, I mowed the lawn and edged the grass with a gas weed-wacker. After a shower, my hands were still trembling from weed-wacker vibration. Also, it's so darn humid that I couldn't pull my skin into position as needed because it just kept slipping away. I got 2/3 of the way through a str8 shave and and gave-up in the interest of safety.
I grazed-over the whole shave with the cartridge blade.
End result: The shave with a cartridge was faster but, no better. My stubble spots are still there.