Huh, I'm positive this was one of the first I considered (or perhaps it was a different dyslexia font) but I can't find the reason why I would have preferred PT Sans over this. Each has some pros and cons: PT Sans has same-width digits; Hyperlegible has a nicer-looking Q (imo); PT Sans has a normal-looking zero (not struck); Hyperlegible has a normal-looking 'fi' combination (no ligature that merges the two characters into a new one); Hyperlegible has a 6 distinct from an inverted 9; PT Sans needs a bit less horizontal space. The font specifically designed for accessibility should be the easy winner if all else is equal anyway

They apparently released Hyperlegible Next in 2025 which, flipping between tabs on Google Fonts (since the original website doesn't show the fonts), is nearly identical but has five new weight settings (nobody should imo ever use thin fonts though, it noticeably harms readability for me and my sight is only the tiniest bit below normal vision, but ok it's an option) and improved kerning (the original font had extremely little space between 'll', for example)

The 2025 version sadly doesn't ship with my version of TexLive, but the original (from 2020) already does so that makes it easy to use as well! Cool stuff, thanks for the tip :)