Considering how easy Tusk is to wear down, especially with stuff like Gliscor around. I don’t think it is that bad of a hinderance. Also in case you wanted to just one shot it.
+2 252 Atk Tera Ground Excadrill Earthquake vs. 252 HP / 4 Def Great Tusk: 354-418 (81.5 - 96.3%) -- 62.5% chance to OHKO after 1 layer of Spikes
On Sand, Drill outspeeds Booster Valiant, even with an Adamant nature and is invaluable on sand teams due to its ability to spin, clean, and threaten fast offensive threats. Considering Ttar has a few good mus into a couple threats, I think sand might make a comeback.