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> I had to support Python 2.4... large enterprise customers that are / were running Python 2.4 on servers...

How did the switch to Lua not break this in the same way?

Sorry for the naive question, I'm just not following how it can be possible to change languages, but impossible to change versions. At first glance, the latter seems like a special case of the former.

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Shipping it as a single download with zero dependencies meant that we would not have to worry in the future about what else was installed on the machine and the versions of system packaged the customers were running.

Couldn't you just bundle Python instead?

Lua and Luajit are small embeddable languages. They link into a single executable, including if you want the program they'll run.

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