I guess because the defaults suits me better, and the configurability is exposed well and I don't have to load special tools or commands to change stuff.
I used to run complicated setups back in the days, with black/flux/openbox or even enlightenment (16), but now I don't really have the interest or time for tweaking DEs.
My first experience with KDE was the beta release that came with SuSE 5.2 in the late 90s. I still daily drive KDE, though very much has changed since then, it still is familiar.
Vivaldi is great, but I've hidden the tab bar, and use the window panel instead. Then you get a nice tree view of tabs (nested, grouped by domain etc) and windows. Kind of treating my tabs as bookmarks, which is probably why it consumes a lot of memory :-)
I guess the last part is fixed in later chromium by hibernating tabs now?
I used to run complicated setups back in the days, with black/flux/openbox or even enlightenment (16), but now I don't really have the interest or time for tweaking DEs.