Far from just an afterthought, the FA Cup can still arouse outrage and controversy in various observers - as evidenced by pundits' recent disagreements over how many changes Premier League clubs should be making to their squads for the tournament.
So, how did the FA Cup games last weekend turn out? In often unpredictable fashion...
Tottenham 4-3 Wycombe
Spurs were in danger of getting knocked out by fourth-tier opposition when Wanderers' Garry Thompson put his side ahead after 83 minutes. However, Dele Alli side-footed the home side to parity before Heung-Min Son clinched their winning goal in stoppage time.
Lincoln 3-1 Brighton
While Lincoln boss Danny Cowley had said before the match that winning against Championship table-toppers Brighton would be like "getting to the moon", the Imps actually managed it - even after the first half saw the Seagulls initially gain the edge through a Richie Towell goal.
Liverpool 1-2 Wolves
After their exit from the EFL Cup, Liverpool have crashed out of the FA Cup, too. What was to blame? Basically, the absence of the skill, speed, spark and scoring prowess that they had delivered to impressive effect in the autumn.
Chelsea 4-0 Brentford
While the Reds faltered, the Blues thoroughly scorched Brentford. Chelsea's depth in reserve was clear to see, as they performed ruthlessly even as Antonio Conte left out many big name first-teamers.
Southampton 0-5 Arsenal
Having finally fully recovered from a serious cruciate injury, Danny Welbeck impressed in his first appearance for the Gunners since May, grabbing a double in just seven minutes. Theo Walcott completed a hat-trick for an emphatic win.
Crystal Palace 0-3 Manchester City
Despite having to contend with golf ball-sized hailstones, City showed their mettle as they thrashed relegation-threatened Palace. Particularly eye-catching players in the Citizens’ ranks included David Silva and Yaya Touré, who converted an awesome free kick in added time.
Middlesbrough 1-0 Accrington
Boro inched past League Two's Accrington thanks to Stewart Downing's 69th-minute strike. While the midfielder hasn't exactly been an ever-present in the side recently, his class at the weekend could have given his boss Aitor Karanka something to seriously think about.
Blackburn 2-0 Blackpool
Gary Bowyer was returning to Blackburn after his sacking from the North West club's managerial post in November 2015. However, already negative memories were compounded for him, as goals from Sam Gallagher and Elliott Bennett inflicted defeat on League Two's Blackpool.
Burnley 2-0 Bristol City
Burnley sealed a place in the FA Cup's fifth round for the first time since 2011, as Sam Vokes and Steven Defour scored and Clarets gaffer Sean Dyche sent his old club packing.
Rochdale 0-4 Huddersfield
German forward Collin Quaner got a goal in his bow for Huddersfield. That was the opener in a match where Isaiah Brown converted a penalty and substitute Michael Hefele twice scored late on.
Oxford 3-0 Newcastle
In this match, the Toon failed to show their credentials as a soaring Championship side. Instead, Kane Hemmings, Curtis Nelson and Toni Martinez took the plaudits as they racked up goals for League One's Oxford.
Millwall 1-0 Watford
For much of this match, Watford successfully resisted a determined Millwall, who nonetheless made a crucial breakthrough as Steve Morrison met Shane Ferguson's cross and fired through Watford substitute keeper Heurelho Gomes' legs.
Fulham 4-1 Hull City
There was more of a whimper than a roar from the Tigers on Sunday, as Sone Aluko, Chris Martin, Ryan Sessegnon and Stefan Johnson all got on the scoresheet for Fulham. An Evandro goal on 49 minutes was all that Hull City had to show for their efforts.
Sutton United 1-0 Leeds United
Through a second-half penalty, Jamie Collins helped Sutton United to secure a victory over a Leeds side ranked 83 league places higher. It is undoubtedly one of the cup's biggest shocks this season.
Manchester United 4-0 Wigan Athletic
Wigan are near the bottom of the Championship while United are near the Premiership's summit. The disparity showed as Marouane Fellaini, Chris Smalling, Henrikh Mkhitaryan and Bastian Schweinsteiger all scored for the Red Devils.