Web browsers do the same thing, they vendor everything they can to make the cross-platform experience better. Given that browsers are pretty much full-blown SDK

Web browsers do the same thing, they vendor everything they can to make the cross-platform experience better. Given that browsers are pretty much full-blown SDKs these days, and with everything being deployed as either a web app or an Electron app, I think it's fair to say that Chrome and Firefox are the new Java.