The ability to modify literally anything you can interact with is amazing on linux.
However.... it's also very time consuming, so I basically never do that.
Linux out of the box without tweaking it will have a lot of behavior you may or may not agree with. I found it to be very difficult to adjust away from the cohesive interfaces found on the mac—you can use readline keybindings on all forms, which only very rarely conflict with application keybindings—and you have the same copy/paste keybindings everywhere you can copy/paste. The system keybindings have been consistent for about as long as I've been alive, I think. The built-in terminal is more than good enough for all my needs, and has excellent keybindings too! I can copy/paste/save/whatever with the same keybindings I use in all my other apps.
In other words, I find the interface to stay out of my way and I can work extremely productively with many windows and processes in flight. It may not be perfect, but dammit, it's about the best level of productivity I can manage, by a large margin.
In GNU/Linux, I'm constantly fighting the interface, so there's an implicit understanding of all sorts of behavior I find very difficult to adjust to. What are those lines under characters in the menu item? Why is my mouse frozen so I can't kill the application that's likely swapping memory? Why does every desktop environment have their own system settings and none of them have a decent gui for configuring trackpad behavior? Why are there two, maybe three different GUI frameworks, and several service layers, so you basically need to install the cores of both major desktop environments to use all the applications? I constantly ran into issues where, for instance, I could configure an app to work with the gnome keyring, but not the kde keyring. It's anarchy in the best and worst way. And don't even get me started on printers, graphics, and wifi drivers. All solvable—eventually. Unfortunately, I only had time for the worst experiences on the clock, and the last thing I wanted to do off the clock was fight the system further. So after two years on linux, after attempting to fight the transition to the touch strip, I switched back.
I did really, really love the paid (pay optional?) app system that was popping up, I found the apps high quality and I contributed to several I "bought", which was an experience that absolutely floored me, and there was some excellent curation involved there on behalf of the folks running the service. Still, the community is still very small.