There will be no sales office here. That said, there is a chance 89X will siphon significant share from 98.7, which could harm 98.7's viability. There is also a chance 98.7 will be relatively unscathed.
Given the fact Audacy has killed its alternative stations in Orlando, Miami and Kansas City all within the past 18 months or so, I'll place the odds at 50/50 that Alt 98.7 disappears within a year from now.
89X sounds terrific compared to 98.7 so far. 98.7 does have a much easier to receive signal, though, in the northern half of the Detroit market (Ann Arbor as well).