I personally am a fan of it and do it to all my pepper plants. Especially if you have a longer growing season. Whether or not its more productive is debatable, but I do know first hand that pruning does improve the structure and stability of most pepper plants. Like you mentioned, fuller canopy and more potential growth sites. It really served its purpose for me when growing in containers. Some varieties would get rather tall even in containers and eventually become prone to tipping. Pruning negated that and created nice, compact, full and lush plants.
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