The big decelerationist threat is a sudden reduction in competition. If either OpenAI or Anthropic drop out or the open weights stuff is banned/becomes uncompetitive then the motivation and tolerance for taking risks with the larger training runs tanks.

The closest we've seen to this in tech in recent decades was iOS vs Android, where Android only really was competitive for a very short window of time (approx 4.x) and it was during that period that both Android and iOS actually improved dramatically for end users. Once Android lost the plot again, and especially in the US market, all that energy started going in some very silly directions.

> Android only really was competitive for a very short window of time

Complete non-sense. iOS and Android are equivalent. Users do not chose Android or iOS because one or the other is better.

It's just brand loyalty, status signalling and ecosystem lock-in that creates enough friction that people don't bother.

I have to use both big mobile OSs for work and have since 2009. As a result I have been able to be a bit of a gadfly and switch between phone OSs a few times for personal use. I have switched three times to iOS for a year or so, cause I liked the iteration of the iPhone at the time. 4, 6s, X. I have always gone back to Android because it seemed so much better and now I don't plan to switch again. As an end user, Samsung's flavour of Android always seemed better than iOS. I don't know how they compare from an engineer's perspective just from a user perspective. One of my issues with Apple though was hating all their attempts to lock me in, and the lowest common denominator UX (I'm not a power user, but some flexibility is always good). If you're happy with the defaults/a willing hostage, that might make a big difference I guess. Still feel like it's always had feature/spec parity with iOS and iOS devices, and sometimes been ahead. What makes you say Android has only briefly been competitive?