TYPO3 Core

We should be aware that hiding the ("major") version of TYPO3 does not enhance security at all. It is straightforward, even without this info to retrieve an relatively exact guess of which version (patch!) the website is running.

So this is more a cosmetic change for clients not aware of this and willing to feel safer without any good reason.

That's true, it would not enhance security, but it would make it less easier to find unsecure sites. The version does not concern the visitor (and search engines) and we don't need to provide it on a silver platter. A bing search for "TYPO3 4.1 CMS" has 13.100 results and most of them are from trustcheck.net and netzcheck.com pointing to outdated installations, due to the meta tag.

Recently an agency contacted one of our clients and pretended his TYPO3 would be outdated – trying to get a job for an update. My client was wondering how they could know the major-version. I told him that anyone – even without any special knowledge or effort – could read it in the html-meta-tags with just two mouseclicks, unfortunately, and i had to explain that 4.5 LTS is still maintained until march and that we had good reasons not to upgrade to early.

Some years ago I reported the same issue, after many discussions my patch request was rejected.
Before anyone start working on this patch, this feature should be checked and discussed.

Thanks! I found the old feature request with your patch: https://forge.typo3.org/issues/17887

The request has been closed with the argumentation, that it does not enhance security and because of missing feedback. The cause for the obligatory publication of the version number remained unfounded.

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/37945

Patch set 3 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/37945

Patch set 4 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/37945

Patch set 5 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/37945

Patch set 6 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/37945

Patch set 1 for branch TYPO3_6-2 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/40243