alt Hacker NewsA little AI assisted digging indicates SDL3 has better support for switching between keyboard layout keys and physical keys depending on context (ie. Game controls can be WASD or whatever letters those physical keys are while it can use international keyboard layouts for chat boxes).
Is that why they are doing this? Did your little chat bit tell you anything about Mojang's stated rationale, which is what I asked about?
Also, GLFW reports both the scan code and the key code, just like SDL, so I'm not sure I really trust those technical details either. Usually, you want to use scan code for some things (e.g key binds) and key code for others (e.g typing), so you can't have a global switch.