The wide (and growing, which is great) variety of fonts designed to be easily readable are so interesting to me because they all start with similar aims, use different metrics, and come up with wildly varying font designs.

Take Kermit, Inter, OpenDyslexic, Atkinson Hyperlegible, Bookerly, and my personal favourite Lexend. They are all expertly designed, do great work at improving readability and legibility, though have very different target readers. Some look hand-drawn/modern/geometric, are bold/thin, single/double storey a, I with/without crossbars, t/l/q/y with/without flick, 3 with/without flat top, are slanted/upright by default, or have `font-variation-settings` to control all of the aforementioned.

Searching "easily readable fonts" brings up even more choice, some of which seem awesome and I'll have to look into. It's a shame that good scientific evidence on font readability/legibility is so difficult to find, as at best there's a case study showing that the font is beneficial to a small, select group of readers, and at worst (Sans Forgetica-style) it's the same but there's a follow-up study a few years later showing that the improvements are negligible or nonexistent.