I don’t know whether this has been in the portal “forever” and I never noticed or if it’s a new thing. Anyway, it’s a nice feature and I’m enjoying it, so I might as well share that with you.
If you look bit more right on the top toolbar when in resource group, you will see a Delete button (no I don’t mean Delete resource group).
When you select some, hence even multiple, resources, you can use this button to easily delete those. Before, I think, you always had to jump inside these resources one by one and click Delete button there. And that was PIA. Being able to do it directly from resource group itself is a great help for me, because I’m often experimenting with stuff (and often deleting complete resource group is not what I want to do during the experimentation).
You get nice confirmation dialog, where simple yes is enough and off you go.
Maybe it was there before, maybe not (let me know, if you know). I’m just happy I know about it now.