I agree to a certain extent; that's exactly how I figure those years out as well.
SB 20, SB 36 and SB 49 specifically are the benchmarks that I use, and do the math from there.
But why go through those steps?
What about all the NFL fans that are not fortunate enough to be a fan of a team like the Patriots, that have none of those benchmarks?
Baseball, basketball, hockey and college football thankfully don't force us to go through that process.
Even the two events that should in theory most likely be using roman numerals - the summer and winter olympics - use years, with the number (arabic or roman) only occasionally used as a secondary way of describing the event.
SB I and II the two Packers one
SB III the Namath Guarantee game
SB IV the Chiefs winning with Dawson
SB V, the Unitas getting a win
SB VII the undefeated Dolphins
SB XIII the Steelers vs Cowboys Super
SB XIX is the Montana vs Marino one
SB XX is the Bears one
SB XXV is wide right
SB XXVI is the Bills/Skins
SB XXVII and XXVIII ate Bills vs Cowboys
SB XXX is the Steelers vs Cowboys in the 90's where the old timers were shedding tears of joy over getting that match up
SB XXXI is Pats vs Packers
SB XXXII and XXXIII were the two Broncos woes
SB XXXIV was the GSOT
SB XXXV was the 2000 Rams one
Then it gets easier because you have the Pats dynasty and a lot of those games end up somehow being relevant to us in someway
XXXVI is our first win
XXXVII is the Gruden revenge game
XXXVIII is the Pats vs Panthers
XXXIX is Pats vs Eagles
XL was the horribly officiated Steelers vs Seahawks game
XLI was the Colts vs Bears which sucked because it should have been us in there
XLII was the closest I've been to death
XLIII was that crazy Steelers vs Cardinals game in the Bradyless season
XLIV was Manning throwing the pick six vs the Saints
XLV was Rodgers getting his only SB
XLVI is the second closest to death I've been
XLVII is that Niners vs Ravens one where Ray Lewis was retiring and they beat us in the AFCCG
XLVIII was the LOB kicking the **** out of the Legion of Boom
XLIX was the Malcolm Butler at the goal line game
50 was the corpse of Manning and Newton not diving on the ball
LI was 28-3
LII was the third closest I've been to death
LIII was us beating the Rams again
LIV was the first the Chiefs win
LV was Brady winning in Tampa
LVII and LVIII were the recent back to back Chiefs
What makes it hard are their are a bunch of unmemorable ones between the late 70's and early 90's that were typically blow outs. Like I know Montana beat the Bengals twice and Elway got embarrassed a bunch of times but I don't always remember the number of the game off hand.