There's something magical about time-travelling debuggers. Great demo of such a debugger in Squeak Smalltalk: https://www.youtube.com/watch?v=r3ZAypTBVmk 1/2
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An amazing project to use Squeak Smalltalk as a phone operating system, and comparing modern phones to the OpenMoko:
I'm impressed to see that GraalVM supports Smalltalk bytecode and therefore you can run Squeak and even interoperate with other supported languages!
Squeak is like an operating system https://tekkie.wordpress.com/2007/07/19/squeak-is-like-an-operating-system/ (nice overview of the Smalltalk system mindset)


