What is the purpose of WASM outside the browser?

Question

I was recently going through a blog that was explaining how to use WASMtime and use WASM outside the browser.But what is wrong with docker or a regular VM?

sinenomine · Accepted Answer

ISA, OS independence. WASM runs in quite unusual environments, for example on some blockchains.

whb07 · Answer

Limited execution privileges. A random binary can do anything in your OS, whereas the spec of WASM doesn't allow it.ie. "run foo.exe with max 500mb ram and it can only exist/touch files in /bar"

What is the purpose of WASM outside the browser?

I was recently going through a blog that was explaining how to use WASMtime and use WASM outside the browser.
But what is wrong with docker or a regular VM?

ISA, OS independence. WASM runs in quite unusual environments, for example on some blockchains.

Limited execution privileges. A random binary can do anything in your OS, whereas the spec of WASM doesn't allow it.
ie. "run foo.exe with max 500mb ram and it can only exist/touch files in /bar"