It's happened going back over the years as well, teams not winning it that should have won it, then coming back the following year a little more under the radar. They include Michigan State in 1986, Lake State in 1994, Michigan in 1998 and BC in 2008.
You can add North Dakota in 2000 to that list as well. It happens in other sports as well. I think of Tennessee in '98 winning the national title in football the year after Manning graduated, or Virginia in '19 in basketball getting the W after being the first ever #1 seed to lose in the First Round.
On a different note, since the NCAA Tournament went to full single-elimination in 1992, teams advancing to the Frozen Four with an overtime victory are 7-15 in the Semifinals (with only 3 winning the title ('94 LSSU, '06 Wisconsin, and '08 BC)). In the history of the Frozen Four, teams winning the Semifinal in overtime are 11-10 in the National Championship game (with the 1985 NC Game featuring two Semifinal OT Winners (RPI and Providence)). Of course, none of that really matters tonight.
Good luck to both St. Cloud and Massachusetts tonight. I'll be cheering for SCSU (per contractual requirement as an NCHC team), but whoever wins will be a deserving champion and great addition as a program to the NCAA Champions Club. The Huskies have the fourth most NCAA Tournament appearances for programs without a title (Clarkson and UNH each have 22, and St. Lawrence has 16), so they are definitely deserving...particularly after so much First-Round heartbreak over the years. Massachusetts has definitely earned my respect. A lot of people attributed their success in '19 simply to Makar, and thought it might be a one-and-done sort of thing. However, their continued success is a great testament to the tremendous job Carvell has done with that program. Long story short, these programs will be back in this situation again, and will probably win several national titles over the years. But tonight, one of them will win their first national title, and I look forward to watching the players, coaches, and fans of that team experience that joy...particularly after such a difficult last year in the sports world.