So you want someone to recode an existing app for you? That would be as much work as coding a new app and as invasive. I think you do not understand what you are asking for. Pop-up messages are invasive. Did you never use a pop-up blocker on your windows?
First off, I'm really sorry if I've offended anyone, that wasn't my intention at all. I'm not criticising PCLOS, I love it, I've used it at work and at home for two or three years and can't praise it enough. I appreciate how much work goes into it and quite frankly I don't know how you guys manage it.
My original post was meant just as a suggestion because I have a hunch that there are a lot of users out there, the home
users that PCLOS is targeting, who don't realise they're supposed to keep an eye on this website and the forum and Texstar's twitter every week. Then their systems get hopelessly out of date, and then when they do try and update, it breaks something. This is no way to attract new users to Linux or PCLOS.
I never mentioned pop-up messages. What I had in mind, as I've said above, was something along the lines of a Synaptic or update-notifier message. In the same way that it currently says "4 new updates and 13 new packages are available for your system" or "An error occurred verifying upgrade, this may be caused by held packages. Do Not update!", I thought it might be useful to say e.g. "For future updates to work you must install aptupgrade". How is this any more intrusive or invasive?
Otherwise, update-notifier just sits there telling you everything is up to date, when in fact it's not.
Please, please, please don't take this personally, it's not an attack on you or on PCLOS, it's just my observation about usability for the non-expert.