"1. ["same way"] Netscape had a monopoly, it wasn't injecting JS into a situation where there was already a scripting language widely used on the web and implemented among multiple competing browsers. It was not fragmenting a multi-lateral browser market or web content language ecosystem..."

"First of all, you did not cite market share numbers to show lack of an effective monopoly..."

"Netscape was a monopoly in effect (it's very rare for a real-world monopoly to have 100% of the market)..."

I don't think you know what the word monopoly means. Market-share is entirely irrelevant. What constitutes the definition (the reason the term even exists: what is meant to describe) is not how "big" a company is, but the _exclusivity_ (as in: is anyone else allowed to ENTER that sector of the market). And using the words "effective monopoly" or "in practice/real world" doesn't work as a permission to misuse the term, either. In fact, it does the opposite. Actual real-world "effective" monopolies would be: An entity holding a patent for some invention, the State having exclusive control of force, etc, etc.

Some company being "the only company who is currently doing X" is not a monopoly, as long as anyone else can enter the market.

http://www.merriam-webster.com/dictionary/monopoly

BTW many of us developers are totally against the evil "effective monopoly" (see what I did there :P) that this not-so-pretty JavaScript language has in the world of web development, so the idea of more options doesn't sound bad at all.

Because last time I checked, there was no axiomatic law embedded in the fabric of the universe which stated that "Every desired improvement and/or business endeavor in the realm of browser scripting should be expressed in the form of a proposal for a next version of JavaScript, over at http://wiki.ecmascript.org, or else the oh-so-heavenly multilateral dimension of the interweb net will fragment and spiral down eventually collapsing into a black hole made of kittens"

Dart is probably going to suck, though (and Java-stained ideas polluting its design will probably be the cause). Also, unless Chrome wants to commit suicide, it's gonna keep supporting JS in the current and future versions, so you JS people should put a halt to this soap opera. Pause thy bitchfest.