Yes, that, accuracy, speed, and single computer-use.

I find those to be the limiting factors to speed.

I have extensive rules, I do extensive planning. Yet at implementation, the rules are not respected, errors are introduced, etc...

I spend more time fixing than writing code.

Then speed... Because of the fixes and bad code quality even with frontiers model speed makes a very big difference. I (agents) spend hours daily doing reviews and fixes. 5x speed boost would make me much more productive.

And when working super fast with agents, having only one computer is limiting. Even worktrees don't solve problems because I use things like convex, chrome use, etc... and it conflicts with each others all the time.

Still many problems to solve. It's already evolved so much in the last two years.