You probably are using a translator, but your point got lost somehow and I couldn’t understand what you have meant to say.
However, I will try to explain the idea as much as possible.
Every new update release, is announced and posted in the Announcements category.
Every new release is posted (& announced) in a new thread, along with its release notes. So you will find a new thread for every new update released. You will NOT find 1 thread that contains them all !
Each one has its own new thread, which gets posted by Jolla here, BUT, only when the new EA release is available OTA*. Not before!
So no user can know the changes or the release notes of a new upcoming update before it gets released. Only Jolla employees.
*OTA: Over the air
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There is NO thread named “Early Release” or "Early Access". That’s why you won’t find it, if you search for it.
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The current and lastest version is 4.0.1.48
You searchedfor 4.1… This is supposedly the version number of the next upcoming release… We, Us, Users… will not find any information about it.
Until it gets released to EA subscribers (OTA) and its release notes are announced on here (In a new thread not yet available)
When Jolla releases a new software update (update release), it gets first released as an EA release, to users who are already subscribed to the EA release program ONLY.
EA program subscribers generally, are developers and users who volunteer for testing new updates before their general release(all users). And usually those users have the basic tools and knowledge to solve possible serious failures (such as bootloops, or if the device needs recovery for example…)
That way, EA subscribed users could test the new update for possible new critical bugs, and Jolla would have the chance and time to fix it, before it eventually gets released to all users.(after 2 weeks).
Also, developers would get the chance to test their applications with the new update and fix them if needed, early on, before all users get the new update.
Generally, Jolla releases the update to all users (no longer EA), in 2 weeks .
Here are 2 Examples (Links) of the 2 previous update releases (release notes).
Every new release / release notes thread is titled as :
[release notes] Name VersionNumber
[release notes] Name VersionNumber
Have a look at those 2 links. You should get the idea of how this works.
I tried my best to simply and carefully explain. I hope I succeeded