I know of Desktop wallet that can be hacked if the coding of the wallet has a breach or something. I mostly use desktop wallets and i heard last time that a wallet of a coin copied private keys of other wallets on the desktop. So that is another way of getting hacked i guess.
I always knew hackers are smarter than that. Some people are still careful but you might not know who is watching you. Sometimes it might be done out of carelessness but not always.