Proprietary renderer (not even source-available; Linux binaries linked against god knows what version of libc, libstdc++, etc) ontop of WebKit? No thanks.

Edit: I mean, sure, you could use it in your proprietary Electron app to make it more lightweight. At least on Windows, macOS and some Linuxes, the rest of users is left out then, but those free software enthusiasts are unlikely to use your software anyway.