It's a great anecdote that shows why we shouldn't ONLY worry about the CS side, but it doesn't mean the system wouldn't have been even more robust/faster/more scalable using better data structures/algorithms. Just because doing the simplest darn thing gets the job done, doesn't mean it's the best way to do it.
Obviously you chose this solution because it made the most sense given your constraints (time/money/knowledge/microcontroller limitations). But that doesn't mean it was an optimal solution nor that with slightly more time/money/knowledge a significantly better solution couldn't have been found.
Obviously you chose this solution because it made the most sense given your constraints (time/money/knowledge/microcontroller limitations). But that doesn't mean it was an optimal solution nor that with slightly more time/money/knowledge a significantly better solution couldn't have been found.