Thanks piperdan, muon is almost as good. If you enter "package search" muon doesn't find the correct application until you write it "package-search" or "packagesearch" so I'm still disappointed as this new solution would be a step back into working things I had before.
Thanks stevepusser, never heard before about "packagesearch" which is finding as good as synaptic - but it's half broken since Debian 9, as "Update Apt-Package Database" fail with errors about incorrect syntax calling debtag. And the "clear search" freeze... and who know what else is broken, I'll never agree to use such kind of nightmare bunch of concentrated failures : this kind of programs are really is bad for my physical and mental health. When you want things to be good you shouldn't feel fine against unacceptable things, so my reactions and frustration are bad when I feel stuck in front of those.
Head_on_a_Stick, gnome-software doesn't work if you're not using Gnome (half broken too ?)
https://image.noelshack.com/fichiers/20 ... -52-46.png
https://image.noelshack.com/fichiers/20 ... -52-30.png
Finally, command lines tools cannot be compared to GUI, even if I love using them on servers or particular cases (programming, scripting, automation) : if command lines tools had a "getErgonomicScore()" feature giving something from 0 to 10, it would return -1
Just look at answers on your link
https://superuser.com/questions/132346/ ... 726#138726
I know it wasn't a joke, but for somebody who doesn't use those shell programming tools, this is light years from any kind of acceptable solutions : I'm well placed to know that even C/C++/Python programming are still more powerful because you will always find something missing into any GUI or command line program, as soon as you want to craft something. If you feel this is an exaggeration you're wrong, it's just the same thing, 1 step further.
I guess I will use Google, and a mixture of different bad tools in order to replace something that was fully working and satisfying, so I guess I won't surprise anybody saying that I'm frustrated about that.
Most of the time I look into what Raspberry Pi Foundation is using for Raspbian. It's often really good/exemplary. If I find something as good as Synaptic for replacement I'll keep you informed here.
Thanks anyway for your feedbacks.