Both 2.3.x and 2.4.x are being maintained by Magento currently. While 2.4.x offers additional features, all of the security updates are being added with 2.3.x. It's not entirely necessary to upgrade to 2.4.x just yet as long as you're keeping up with the security updates. - A. Fletcher. May 14, 2021 at 7:43. thank you for your answer.
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