The personal computers that existed at that time were poorly suited to writing

Were they? [0]

A legitimate early use of personal computers was to replace the typewriter, as the modest requirements of basic word processing lent themselves well to the equally modest capabilities of these early machines.

By the early 1980s, the word processing market was dominated by two main rivals: WordPerfect and WordStar. Microsoft wasn’t even in the running yet, as the 1983 MS-DOS release of what would become Microsoft Word (then called Multi-Tool Word) came and went with hardly a splash.

This article [1] on use of word processors by well-known authors in the early 80's (and before) is worth reading too.

Oh, and as far as memory goes, remember these devices had floppy drives that could store at least 360Kb and, in March 1983, the IBM PC XT came out with a 10MB hard drive.

[0] From https://retrotechreads.substack.com/p/the-rise-fall-and-surp...

[1] https://newrepublic.com/article/133011/literature-became-wor...