I joined the Royal Signals in 1997, they'd stopped teaching morse but there were a number who knew it. The distance that morse could travel when voice couldn't was impressive.
I also had a trip on HMS Illustrious. Officers there could read some morse as they didn't have to wait for the signallers to translate it for them. Orders were passed to ships during a RAS via lamp, these were course corrections so needed to be relayed quickly, I don't know if doing this via a tablet would have been achievable.
It was pointed out that smaller ships only had HF sets, they didn't have satellite communications. If the reception was poor then data/voice wouldn't get through but morse generally would. I doubt the Royal Navy will be stopping using it soon.