Yes "old-stable" is now based on 0.4.2 as 0.3 is also beyond support from us.
But clear questioning also: You have written about "wasting too much time to configure 0.4". The version 0.4 is for sure quite different in many points and in usage. So you think it is too much time used to get a running system, while the outcome can be a solid installed operating-system?

With all the possible hardware-combinations out it is near impossible to get all ways simple configured and so there is a price to pay. But with the time used, nobody gets less. Even there is more to get as the knowledge can be used further in the future for many other things. So I do not get the point why to migrate back towards a not even no longer supported version just because it seems more simple besides there is also the point that 0.3 was a puzzle piece on our road away from bloated frameworks and was marked as that. Same way as 0.4 is now marked as a point towards HyperbolaBSD.

I think we need to underline also: Hyperbola was and is always coming with the combination that I as user have to research on my own. When I do not have all pieces: For sure questions help, but there is the need for researching own ways when the stock installed base is not running out of the box. And everyone can learn further when I later write about my personal experiences. I think this needs to be underlined again. If this is not in perspective - not meant towards you but more generalized - Hyperbola is and will be the wrong system. Technical emancipation is the base decision and this can be reached only with each other! Besides it was always noted that keeping an own mirror is recommended, also again to underlined here.