You can also configure, what will happen when the power button is pressed (I think it puts the computer to sleep by default). In this case, you don't have to install anything, it is in the control center.
When you select the second option, "shutdown", and then press the power button, it will throw a dialog at you, that the machine will shutdown in 60 seconds (and will display countdown), together with "cancel", "reboot" and "shutdown" buttons.
Evilwm still seems like the window manager that got thing mostly right to me. It draws the windows and there's a keyboard short cut for opening an Xterm (and for moving and resizing the windows), you don't really need much more than that. Sadly it seem that the focus for the simplest window managers is tiling, which I also to like.
Hopefully a non-tiling, dead simple window manager for Wayland will appear in the future.
https://wiki.archlinux.org/index.php/Wayland#Window_managers...
I too have been longing for an Openbox port for Wayland but have sticked to Sway in the meanwhile.
These paradigms may or may not have been well thought out and useful, I'm not here to make that judgement, however what they did (particularly with Gnome 3 and windows 8) was push you to use the new way, either with no concessions at all to other ways of working, or vague promises that they would come later. This presents users with a learning curve and that's offputting when really you just want to get stuff done in pretty much the same way you did yesterday.
For me the crucial point is that Windows (pre 8 and 10), MacOS and Linux DEs like Xfce, MATE and various others don't try to push you, and do things in a fairly 'standard' way. A menu bar may have moved, some graphics look better than others, there might be a clock in a different place. But they don't force you to full screen, try to hide all the things you've done before, make choices for you on which applications to use for what, etc etc, behaviour is pretty predictable. And if it's not, you can make a few tweaks without much fuss.
So they aren't broken, but they do present a barrier to entry, and often a lack of flexibility (I'm specifically not talking about KDE as I haven't used it on over a decade).
And it's not just a DE vs WM thing. I'm fine with Gnome 2, for example - it also "just works" in that sense. And Xfce is really a DE these days, as well (I'd say that feature-wise, it's on par with earlier Gnome 2 releases now).
I think they project is going to die in the future, not necessarily in an abandonment sense, but it will severely lag behind, due to lack of resources (I also think the developers behind it are not really good).
Thunar (the file manager) had, for around an year, a bug where around 20% of the time, moving/deleting a file would cause a crash - this was in fact marked as critical. There have been some clumsy attempts to fix it, until the fix came out after a long time.
Thunar is also, mysteriously, for several reasons, an enemy of keyboard users (try to use it this way, and you'll understand).
It's not realistic to switch file manager, as there is a disconnection in the desktop usage workflows, and unfortunately, the file manager is a core part of a DE.
Of course, not everybody has such requirements from a file manager/DE, so it may be a good choice for many, although it's not really true that all the other Ubuntu distros are so disruptive, in particular, at least a comparable one isn't (and I suspect there are more than one).
As soon as the whole kerfuffle hit with gnome 2 being forcibly deprecated, I tried Xfce, found it lightweight and configurable, and stuck with it.
Never regretted it, as a desktop it works and it keeps out of my way. Perfect.