Heh, I'm not even sure WordStart other styles at that level. Changing the color back then would mean having the print job pause and the screen prompt you to change ink ribbon and press a key to continue. I can't remember if it could also prompt to change the daisy wheel, or whether font was a global property of the document. The daisy wheels did have a slant/italic set, so it could select those alternate glyphs on the fly from the same wheel. Bold and underline were done by composition, using overstrike, rather than separate glyphs.

But yeah, this tension you are describing is also where other concepts like "paragraph styles" bothered me in later editors. I think I want/expect "span styles" so it is always a container of characters with a semantic label, which I could then adjust later in the definitions.

Decades later, it still repulses me how the paragraph styles devolve into a bunch of undisciplined characters with custom styling when I have to work on shared documents. At some point, the only sane recourse is to strip all custom styling and then go back and selectively apply things like emphasis again, hoping you didn't miss any.