RE: Technical downloads center gone, why?
Seems that some older versions are available and some are not. You can for instance find downloads on some of the old ones by clicking the internal document link on the release.

However this does not apply for every version and some give a 404 not found instead.
Would be great to have them available as before. It's not really important where they are as long as we can get them.
We download old versions for upgrade reasons and for testing once in a while.