fpcup and similar "compile it yourself" tools are really not solution. We expect to just install it and use it.
So question is: Is there such Linux distributions with modern concepts where it is possible simply to install latests Lazarus release?
Dear Chronos, I understand your mood very well. Like you, I expect the Linux desktop software to be easier to install.
However, the reality is very skinny, most Linux distributions do not get 'out-of-the-box', so Lazarus wants to do 'out-of-the-box' on Linux, which of course will be one Difficult things, like the tower of the floating sand.
Compared to other large software, Lazarus Linux installation has been very simple, only three deb files. I found that only Firefox can do it easier, it can run by unzipping it. In the Lazarus version 1.6.x era, nothing went wrong. This 1.8.0 error in ubuntu1604 has been rapidly updated.
I find it hard to help the Lazarus development team, so I'm still willing to be patient.