What EAC will do for VRChat:
Lower framerates
Increase instability
Stop script kiddies
Stop "wholesome" mods, accessibility mods, and quality of life mods
Stop AMD FSR/RSR, Intel XeSS, Nvidia VRWorks SLI from improving your framerate
Stop select SteamVR mods that modify the game's runtime
Stop programs like AudioTeapot (audio manager/soundboard) from working
Stop Linux users from playing via proton (they claimed it wouldn't yet it does)
Stop Linux users from playing via Windows virtual machines
Lower the playerbase

What EAC will NOT do for VRChat:
Stop ripping (Avatar cache is still unprotected)
Stop crashing (Crasher avatars)
Stop all malicious mods (Those devs see this as a programming challenge)
Stop all malicious actors (There's other ways of being annoying)
Stop SDK modding
Stop user harassment (Stop claiming this!)
Close the security holes in VRC Udon
Improve the game experience

What EAC has done in the present/past:
Take routine snapshots of the user's desktop/video buffer
Scan all processes running on user's machines
Kill or try to kill all "unknown" or "untrusted" or "unregistered" running processes (including homemade processes)
Locate the files of "unknown" or "untrusted" or "unregistered" processes and upload them to Epic's servers
Scan the user's C:\Users\ folder and appdata folder
Stop users from launching the game if Windows fails to install/update itself "correctly" (google "easyanticheat UNEXPECTED-KERNEL-MODE-TRAP", though epic tries to censor this issue)
Stop device drivers that are "unknown" or "untrusted" or "unregistered" from running (including homemade drivers)