The egotistic developer will believe that creating a new programming language is the key, secretly striving for the silver bullet, even though he would never openly admit it because he is not even conscious that he is doing it. Some people believe that the silver bullet is Lisp, but for some strange reason, it has failed to slay the dragon for the past 50 years and counting.
The more seasoned developer, unambitious and static, will believe that creating a new language is a waste of time due to how many wheels have to be re-invented in a new language before it even approaches the usefulness of existing languages. Not to mention the fact that any feature could simply have been implemented in (or on top of) the existing language in the first place.
I think the only thing that makes sense is to strike a balance with something that allows (an order of magnitude) more succinctness and extensibility without sacrificing the millions upon millions of man-hours already spent by armies of programmers. We can stand on the shoulders of giants like IBM, Microsoft, Sun, and Google, and move forward without taking a giant leap back.1
On that note, we have people building things like Instapaper. And Instapaper is great; I use it. But it's silly that I now use 2 completely separate bookmarking services that are oblivious to each other.
Of course, upon closer inspection and further use, I realized that the way I use del.icio.us and the way I use Instapaper are completely orthogonal. That is, the set of links that I save to del.icio.us and the set of links I save to Instapaper are completely disjoint. Occasionally I will first save a link to Instapaper, read the article, and then save it to del.icio.us, but that is a rare exception.
However, it's completely obvious to me that the functionality of Instapaper is a proper subset of the functionality of del.icio.us. In other words, everything that Instapaper can do, del.icio.us can do and more.
Why then didn't Marco build Instapaper over del.icio.us? It seems like a perfect match.
With the Web 2.0 craze, APIs started popping up everywhere. Even tools like Pipes and Popfly to wire those services together. But who is using them?
Instapaper's value is solely in its amazingly simple interface. The reason I use it differently from del.icio.us is because its interface affords to different things. It makes different operations cheap, and that changes the way I think about those operations. But why doesn't Instapaper integrate with my del.icio.us account, simply tagging things with a "read-later" tag? When it comes to bookmarking, del.icio.us is king; there's no disputing that. Instapaper wouldn't have less value if it were built on top of del.icio.us, it would actually have more.
And this, in my humble opinion, is the next step for the web. People will finally start realizing that most of the functionality in their little web app to-be is already done — not in a library — but in a web service.2
Services that do single things — and do them right — will be indispensable to the web. And a glue language will be in high demand. But personally, as an entrepreneur, I'm not looking towards Yahoo Pipes or Microsoft Popfly (yes, in direct opposition to the idea of standing on the shoulders of giants). I want to own my mashups, and those services don't give me that at all.3
1. And this is why I have been very interested in Clojure — an extremely practical Lisp built on top of the JVM.
2. For example, I will almost never have to create my own charts, as Google already did it. Ditto for maps.
3. If you haven't heard me practically shouting this already, I want a glue language for the web! I will personally thank anyone who builds one that doesn't suck. But people, please don't comment here saying X is already that glue language. [Ruby on Rails people, I'm looking in your direction. ;-) ]