A frontend graphical package manager can incorporate a notice to read important notices ELSEWHERE. See Rigo, the defunct Sabayon Linux’s package manager [the purple strip at the top of the package manager window]
If you click on the [let me see] button, it brought you to a simple webpage where the update warnings were. I assume this can be adjusted to link to post 2 of an update announcement thread.
I have proposed this suggestion at least 2 times previously, in the original Manjaro Forum, and in the 2nd or third one that used to be archived here but is now gone. There seemed to be no interest in it [standard previous response - “those who can’t be bothered to read will just ignore the popup”].
So if anyone else wants to pursue this suggestion again, go for it. It won’t be me.
I use terminal commands to update all my distros (including Sabayon in the past). But I always thought Rigo’s popup was a helpful functionality for those who relied on a graphical updater, to inform them when they should read something important before commencing update.