Spliced and fused sentences appear frequently in literary and journalistic writing, where they can create momentum with a rush of details:

Bald eagles are common, ospreys abound, we have herons and mergansers and kingfishers, we have logging with Percherons and Belgians, we have park land and nature trails, we have enough oddballs, weirdos, and loons to satisfy anybody.

– Anne Cameron

Context is critical. Depending on audience, purpose, and situation, structures commonly considered errors can be appropriate and effective.