In case it's helpful: in Chrome you can shift-click and select ranges of tabs and close them all at once.
Once you've done that, you can drag the whole selection into another window or a new window too.
Bonus fact: the itemized selection done via Ctrl-click also works with tabs. If you use Ctrl-W you can close these tabs, or if you drag one of them you can extract all the selected tabs to a new window.
For sure, it's an "obvious in retrospect" sort of thing once stumbled upon. :) After a bit of research, the mechanics appear to have debuted in Chrome in 2013. Any earlier examples?