It wasn't so long ago Ange Postecoglou was regularly turning to the Celtic academy just to fill his bench.
There are certainly some promising talents in the Parkhead youth ranks, but there was more than a hint of necessity about some of the squad inclusions earlier this season.
But with a second transfer window under his belt, the manager is now in a very different position.
His Celtic team are almost unrecognisable to that of last season under Neil Lennon.
The board have thrown their financial weight behind the Aussie, cleared much of the deadwood and, as such, Celtic are now a very different proposition.
Not only are most of Postecoglou's signings proving a success, they have added a depth that simply did not exist at the start of the season.
That strength was underlined at Fir Park on Sunday, as the manager opted to leave derby standouts Jota, Josip Juranovic and Matt O'Riley on the bench.
In came Daizen Maeda, Anthony Ralston and Tom Rogic for what proved to be a seamless transition, with the latter helping himself to a double in a dazzling performance.
Celtic smashed four past Motherwell in what may well have been their most complete display of the campaign to date.
The noted drop off in intensity failed to materialise as O'Riley, Jota and James Forrest kept Celtic's attack fresh with second-half appearances.
An overview of Celtic's options now shows, when at full strength, they are capable of fielding at least two completely different sides that fans would fancy to win most domestic matches.
Of course, with the likes of David Turnbull, Yosuke Ideguchi and Kyogo Furuhashi still out injured with no confirmed return date, it will be a while yet before Postecoglou has his full squad to choose from.
But the possibilities when he does will be most welcome for the 56-year-old, given how injuries and a lack of depth put a strain on his selections earlier in the campaign.
First Celtic XI: Joe Hart; Josip Juranovic, Cameron Carter-Vickers, Carl Starfelt, Greg Taylor; Callum McGregor, Reo Hatate, Tom Rogic; Jota, Kyogo, Liel Abada.
Alternative Celtic XI: Scott Bain; Anthony Ralston, Stephen Welsh, Christopher Jullien, Liam Scales; Yosuke Ideguchi, Matt O'Riley, David Turnbull; Daizen Maeda, Georgios Giakoumakis, James Forrest.
