[RLlib] New API stack is enabled by default, but "New API stack migration guide" says the opposite

[ema-pe]

Description

Hi, I'm using Ray RLlib 2.40.0 and the new API stack is enabled by default, but the documentation web page "New API stack migration guide" in the "Change your AlgorithmConfig" section says that "RLlib turns off the new API stack by default for all RLlib algorithms", see the attached screenshot and code:

ray/rllib/algorithms/algorithm_config.py

Lines 417 to 423 in 22541c3

	# `self.api_stack()`
	self.enable_rl_module_and_learner = True
	self.enable_env_runner_and_connector_v2 = True
	self.api_stack(
	enable_rl_module_and_learner=True,
	enable_env_runner_and_connector_v2=True,
	)

I think the documentation is wrong and out of date.

Link

https://docs.ray.io/en/releases-2.40.0/rllib/new-api-stack-migration-guide.html#change-your-algorithmconfig

[simonsays1980]

@ema-pe thanks for raising this issue. You are right. We changed lately the default to the new API stack and forgot to change the docs accordingly. Great catch!