When is the update to Godot 4 coming?

I'd like to address about the update to Godot 4. This course was recorded with and for Godot 3.5+, and the course landing page used to promise a free update to Godot 4.  UPDATE 13/02/2024: The landing page still promises the free update to Godot 4 and I have reverted the decision to charge for the update for Godot 4. If you buy the course now, you are still going to get the update for free.

(PREVIOUS NOTICE: if you bought the course until 06/August/2023 you are still going to get the update to Godot 4 for free. If you bought it after 06/August/2023, then the update to Godot 4 will be offered to you with a discount of 50% or more). 

So when is that update coming? The thing is, when Godot 4 stable was out, it was not really stable. And now there are currently 3 branches of updates:

• Godot 4.0
• Godot 4.1
• Godot 4.2

Each with their own sets of issues, incompatibilities and breaking changes. And considering that recording the course for Godot 4 will be almost as like starting from scratch:

1. Port the codebase (the inventory system) to Godot 4 (or 4.1? or 4.2? or 4.3? or 5.x?)
2. Write a new course script to accommodate for all the changes
3. Record
4. Edit

Basically, it's a gigantic task (as I said, it's basically creating a new course from scratch), I really need to be careful as to which Godot 4 version I pick, to avoid a possible new version of the course being outdated or deprecated due to a new "Godot-4.x-stable" coming out as soon as the course is published.

For that reason, I am still postponing the course update to Godot 4. But I either do it already or it will still probably take a long a time. So I need your help...

What is your opinion?

• Which version should I choose?
• Should I just pick up one of the 4.* branches and go with it or should I wait for a "more stable than stable" release, i.e. a Godot 4 LTS version (Long Term Support)?

POST UPDATE 1:

Fixed dates which said "June". I actually meant "August".

POST UPDATE 2:

Update to Godot 4 is going to be free again.