Assuming that you're right that we're not (and I'm not convinced; a lot of amazing stuff is coming out of the open source community):
Time.
I'm working on a Ruby ahead-of-time compiler. I started in 2008. I slowed myself down a lot by all the blog articles I've written about it, but yet, at this point it's only now getting close to being able to compile itself.
The reasons it's been so slow going, is that in those years, I've only put in the equivalent of a few months of fully time work on it - it's not my only project, and working on my side projects have to compete with spending time on my son and other leisure activities.
It takes a lot more people to get the equivalent output of a lab of fulltime staff. Even more so because this slows down interaction and communication as well.
Comments
Assuming that you're right that we're not (and I'm not convinced; a lot of amazing stuff is coming out of the open source community):
Time.
I'm working on a Ruby ahead-of-time compiler. I started in 2008. I slowed myself down a lot by all the blog articles I've written about it, but yet, at this point it's only now getting close to being able to compile itself.
The reasons it's been so slow going, is that in those years, I've only put in the equivalent of a few months of fully time work on it - it's not my only project, and working on my side projects have to compete with spending time on my son and other leisure activities.
It takes a lot more people to get the equivalent output of a lab of fulltime staff. Even more so because this slows down interaction and communication as well.