As a long-term (since last century) KDE user, it took me a long time to get used to Dolphin and wean myself off Konqueror.
I still see some weird artefacts / behaviour in Dolphin, notably around the sizing of the quick-access panels on the left, after window resizing, or display switching (effectively causing the former).
The copy/move option was present in Konqueror also, along with the same ctrl/shift modifier option to force copy / move without the pop-up.
FWIW with Microsoft Windows, for as long as I can remember, in Explorer you can right-mouse drag directory entries around, to trigger a similar copy/move pop-up. A little-known feature, but increasingly handy as Microsoft continues its war on its own users and obfuscates actual locations & paths, with the default move-if-on-the-same-drive / copy-if-not becoming harder to intuit due to these location abstractions.