[ssokolow]

Give the "Indic scripts" section of https://manishearth.github.io/blog/2017/01/15/breaking-our-l... a read.

TL;DR: Unicode is complicated because some non-Latin writing systems are complicated and those non-Latin writing systems account for over a quarter of the world's population. (They're either majority or present in India, Indonesia, Pakistan, Bangladesh, the Philippines, etc.)