In a beginner/teaching environment, portability is desirable. In a production/commercial environment it is a non-sequitur as the code you work with is always going to be optimized for the destination platform. Often in the latter, portability carries overhead at too great a cost.
The above quote is a post belongs to an anonymous Forum Member in some other Section.
I am particularly impressed with the beauty of the construction style of the sentences and their coherence. However, I am at a loss to discover how the writer could miss a comma (,) after the introductory phrase of the second sentence when the required commas have been correctly placed after the introductory phrases of the first and third sentences.