G'day Bloggsy! I seem to remember being taught about the origins of formation flying in Queen Betty's Flying Club. The idea was to look after your old mate and fly as a single unit.
Encyclopaedia Brittanica seems to agree with me on this:
formation flying | aviation | Encyclopedia Britannica
I'm not disputing that non-combat aircraft could conceivably or even enjoyably be flown in formation. I'm just saying that it seems pointless in a trike. Yes, the footage of the A350s is stunning. As was this one, possibly the formation to end all formations:
CONCORDE SST : FLYPAST - stunning, hey?