There’s now 2 incentive to support ARM better - Apple’s move to ARM on the desktop and cheaper cloud bills if you’re willing to use ARM instances. Either one wouldn’t be enough of an incentive, but together it will cause a shift in the next 3-5 years.

Developers will become more aware of the differences between the architectures, tool chains will accommodate both better, people and software will stop assuming they are running on x86 as default. ARM won’t “win” the desktop or the server market, but it will become a viable alternative, squeezing the profits of companies who depend on x86.