I’ll be more specific.
All this time I have not seen any obstacles to make flathub, at least as an option provided by default.
The reasons why this was not done were indicated in my message above.
And specifically, Mark Shuttleworth’s statement, where he says that flatpak is not suitable because:
I don’t think they have the security story and I also don’t think they have the ability to deliver the same integrity of execution over time that Snaps have ‘cos we built those things into Snaps.
And the statement is to remove flatpak, because there should be only those types of packages that are supported by the Ubuntu community.
What is in the first case, what is in the second, I would like to know more specific arguments.
If you follow this link, then in the last 30 days (from May 26 to today) I have found 5 topics.
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The first one was not commented on in any way (created today)
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The second was commented with a request to provide more information
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The third one is not related to Ubuntu at all
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The fourth is not related to the problem of flatpak and its work in general
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The fifth is generally considered a guide
Perhaps you had other questions in mind?
Please specify.