The old fonts that have been designed as bitmap fonts or as scalable fonts, but with good manual hinting (which is equivalent with designing bitmap font variant

The old fonts that have been designed as bitmap fonts or as scalable fonts, but with good manual hinting (which is equivalent with designing bitmap font variants for a set of usual sizes), can indeed be perfectly sharp. Nevertheless, such fonts are always uglier than the good fonts which are rendered on a high-resolution display, where more pixels per character cell are available. Even the 4k displays, when at typical desktop sizes and viewing distances, have a significantly lower resolution than what has been provided by the traditional printing of books on paper and than what is needed to exceed the resolution of normal human vision. I do not consider any display that is uglier than a printed book from a few centuries ago as an acceptable display.