Football systems and tactics work in trends, and if someone changes their set-up and it's successful, others tend to follow.
Neil Lennon has mixed up his Celtic side by pairing Leigh Griffiths and Odsonne Edouard as a front two. His reward has been a blistering start to 2020, with the goals flying in.
It's no coincidence, then, that over the past few weeks other Premiership sides have followed suit.
Kilmarnock, Hibernian, Ross County and Aberdeen are just some clubs who have tinkered with a so-called old-fashioned front two and it's paid dividends.
Playing two strikers means you can get the ball forward quicker. In wide areas you can get more crosses into the box, as you should have better options. It changes how you play.
Coaches sometimes get caught up in playing three central midfield players to gain ownership of the game from that area. In my eyes, though, there's no point in having ownership of a game if you don't carry enough of a threat in front of goal. A well-coached pair of strikers will guarantee you more goals than an extra midfield player, as their instinct is to shoot and mindset is to get in the box rather than passing for the sake of it.
I'm sure others will be taking notice. Watch this space.