Kazuha is not as unnerfable or future-proof as you would imagine. A META analysis about Kazuha (This is not a post to discourage you to pull for him) : r/Genshin_Impact
Genshin Impact 2.8 leaks allege that Kazuha's new signature weapon is nerfed
Why Is Kazuha So Strong And Will He Be Nerfed In Genshin Impact 2.8? | GINX Esports TV
GOD-MODE KAZUHA! (Genshin Impact) - Bilibili
TOP 5 Reasons Why Genshin Kaedehara Kazuha Is The Best MUST-HAVE