Savard's not really a bird in the hand though. He's 33 and a 3rd pair D at this stage in his career, there is extremely limited future value there. The post you responded to was only a selected list of guys that turned into legitimate impact players or at least top 6 forwards/top 4D though. Looking at 2008-2017, the list of regular NHLers is significantly longer (and there's some impact guys in this list too).
Ennis, Markstrom, Voynov, John Moore, Johansson, Palmieri, Sheahan, Pysyk, Murphy, Namestnikov, Noesen, Rakell, Maatta, Pearson, Mantha, Dickinson, Hartman, Fabbri, McCann, Beauvillier, Howden, Frederic, Yamamoto, Chytil, Poehling, Frost, Jokiharju, Tolvanen, etc. That's another 28 players who all became equal or better than Habs-era Savard who's just a 3rd pair D, and I would value control of the age 18-27 seasons for most of these players significantly higher than 1.25 seasons of 33 year old Savard.
The names listed above that demonstrate the probability is likely closer to something like a 35-40% chance you'll produce a regular NHLer in that range, but if we just ignore them and go with the 18% figure, I would still absolutely take "just" an 18% hope of an NHLer over the "bird in the hand" of having Savard for 100 more games.