Looking at the usage relative to browser support, the UC browser for Android is a bigger concern, no doubt it will add support soon unlike IE.
See here and click 'usage relative': https://caniuse.com/#search=WebAssembly
See here and click 'usage relative': https://caniuse.com/#search=WebAssembly
If 90% of your users are on IE, it's not enlightening to point out that those 90% only make up a tiny fraction of the global browser users.