Comment by 0x457

If web browsers had any kind of stable interface we wouldn't have: https://caniuse.com/, polyfils, vendor CSS prefixes and the rest of crutches. WASM isn't binary. But that's all irrelevant when we talk about ABI.

ABI is specifically binary interface between binary modules. For example: my hello_world binary and glibc or glibc and linux kernel or some binary and libsqlite3.