Thanks for the facts!What were the two years of twice?
I see S/B withdrew from worlds in 2016 due to an injury, lack of training time, etc (in fact that injury was an ankle injury, NOT a concussion, but I'll count it as "once" anyway).
In 2017, the year of Seguin's first concussion, S/B missed Canadian Nationals, but recovered enough to go to Worlds instead of M-T/M. So just the opposite of what you described (if indeed you were thinking of that year as the second year in "twice").
Both teams medaled at Nationals and went to Worlds in 2018; M-T/M came 7th and S/B 22nd at Worlds.
In 2018 it was I/M who were left off the (Olympic) team because of a major (and career-ending) injury and 4th place finish at Nationals. They may have been offered Worlds when D/R didn't go and turned it down. bIn any event, Ruest/Wolfe, the 6th place finishers at Nationals, were the 3rd Canadian team at 2018 Worlds.
By the way, I was at Nationals in 2018, and there was much puzzlement in the audience when S/B placed ahead of M-T/M. I remember someone looking up the protocols on her smart phone while we were waiting in the inevitable ladies' room line to try to explain it.
I like S/B, MT/M and I/M and think they had similar scoring potential (all fighting for 2nd behind D/R). Implying consistent superiority of S/B over MT/M is an opinion biased by personal preference rather than history. I remember all three pairs being hit-or-miss with jumps at the time (esp. SBS).
I appreciate MT/M's speed and pair skating skills in this field. They improved a lot in the last couple of years. Maybe I/M and S/B would match or best them in this department if they were still competing, but they aren't. The poster who dislikes MT/M seems to be hoping S/D will grow to crush them, but I don't think that's likely anytime soon.
By the way, J/C were good at projecting sexiness but they didn't have the greatest skating skills. Whether a pair's style vibes with you or not isn't the main factor in determining PCS.
I'd also add that J/C didn't invent sexiness and not every pair who aims for romantic chemistry is trying to copy them.