Montreal and Columbus have been pretty much neck-and-neck the last two seasons. The season prior to those y'all were well behind us (having fallen into drafting 1st overall). The teams have so far appeared side-by-side in rebuild progress. Therefore, presuming Columbus has "several years yet" of doomsday is only applicable if you have a similar expectation for Montreal.
I'm agree that they're not worlds apart. However, the difference imo is that a lot of the Habs young core was acquired before these difficult seasons following the finals appearance. Suzuki, Caufield, Guhle, Romanov which turned into Dach who's the same age as Suzuki, Newhook is that age too. Mailloux is a promising defenseman drafted by the previous management.
We've added Slafkovsky, Demidov, Reinbacher, Hutson and Jacob Fowler to this foundation since then, which means the Habs rebuild and turnaround are going to be quicker, since their U25 pool is quite deeper. It's just a prediction though, Colombud added great pieces too and Fantilli could easily explode this year and help them take the next step.