'Es uno de los errores más habituales hoy en la puntuación, junto con la supresión de la coma en casos donde es necesaria. No obstante, su uso es válido: Wikilengua, normally a reliable source, claims that this use of the comma ( la coma de yuxtaposición) is incorrect, except in certain cases however, they have based their conclusion on the comma splice, which, as mentioned, is tolerated far less in English. 'Se separan por comas las oraciones yuxtapuestas de sentido distributivo: 'Unos se ganaban la vida cazando, otros pescando, los más cultivando los campos' también las expresiones correlativas que reproducen un mismo esquema gramatical, propias de dichos populares o fórmulas fijas: 'Hecha la ley, hecha la trampa' 'Ojo por ojo, diente por diente''. ' Unos están fríos, otros están calientes' yet, in practice, use is widespread and generally accepted in informal writing. In Spanish, this kind of construction is generally referred to as ' oraciones yuxtapuestas', and it seems to be somewhat of a grey area: some resources suggest that these are only possible when used in a distributive sense, e.g. Since it's my decision, I'm not going to argue. It's my decision, and/but/so I'm not going to argue.

It's my decision -I'm not going to argue. It's my decision I'm not going to argue. It's my decision, I'm not going to argue. In English, a comma splice is generally considered a blatant mistake, and several alternatives are offered to correct it: 1 In fact, Spanish-speaking learners of English are notorious for their so-called 'run-on' sentences, most notably the inappropriate use of a comma to join independent clauses without a conjunction (and, but, although, etc.) this is known as a comma splice.

Something you soon discover when learning Spanish is that, compared to English, sentences can sometimes seem impossibly long. Comma splice in Spanish - oraciones yuxtapuestas

Runon comma splice checker