It would be so nice to have the ability to arrange the cards in lovelace.
Actuelle its a pain in the a… to get an “Dashboard” thats look´s like i want and that scaled with my windows Size.
I dont know why it must be so complicated to get this achieved.
I´m using Grafana quite often and they have achieved this in a quite handy way 
Here i made an Screen Record that should make it Clearer what i mean:
I agree, grafana is a joy in this respect. Once you snap the panels to the full window width, they glue to it. If not, they keep a fixed size as much as they can.
Not only that, but the built in “repeat for each instance of _______” with autofill of workable variables. It’s obvious, all the data is there in home assistant to accomplish the same kind of flexibility. It’s basically the auto-entities mod, built into the GUI. This must be on the roadmap!