I have two pairs virtual edition, two internally and two in DMZ, running with v14, I'm planning to upgrade them, so would you please suggest which most stable version I can go for upgrade.
Are you looking to upgrade to the major version e.g. v15 / v16 or to stable version in v14 ?
It is always best practice to upgrade to point release version in your tree version which is hotfix. This latest point release version will have all the latest security patches and maximum stability. You can refer below guide to get more clarity on it.
