I could not read it because paywall (or rather register wall), but that doesn't sound completely correct. Even before (gasp!) spaces were invented, Latin had the "interpunct" - https://en.wikipedia.org/wiki/Interpunct

Scriptio continua though was a thing used for a long time but apparently more for style and theatrics than anything else. It looks like reading was seen as an oratory performance. https://en.wikipedia.org/wiki/Scriptio_continua