Regarding the bolded: there were 20 seniors or 5th year seniors on the 2018 roster for the Tide. Of those, 3 returned to Alabama for their 5th year (Jalen Jackson, De'Marquise Lockridge, and Mike Bernier). Four were drafted: Damien Harris (3rd round, Pats), Christian Miller (4th round, Panthers), Ross Pierschbacher (5th round, Redskins), and Isaiah Bugg (6th round, Steelers). At least two were signed as undrafted free agents: Hale Hentges (Colts) and Lester Cotton (Raiders practice squad).
To my knowledge, the remaining 11 are not sniffing the NFL (although some may have gotten invites - I did not scour through every team's UDFA lists). The Tide, btw, are one of the top teams when it comes to placing NFL talent.
I would say most rookies would be ecstatic to be on an NFL team, even if they were former 'Bama players.
FWIW, there were 6 underclassmen drafted. All are still with their drafting team, although one (Jonah Williams, the first round pick of the Bengals) will miss the entire season.