Yes, there are historic reasons why the arcane style of coding in old VistA code was used.
No, a modern developer would not code this way (unless they were either having to maintain old legacy code or inept)
Like it or not, VistA has been highly successful, unlike the many eye-wateringly expensive failed attempts over the years to replace it with "better" or "more modern" technologies. Go figure, as they say in the US.
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