During my younger days, when free liquor would have been a meaningful factor in my choice of airline, I rarely had the money to spend on international travel.
Now, when I have the budget for international travel, free booze is not a meaningful consideration. I suppose that, if there were a choice of two carriers and all other factors were the same (they rarely are, but we are speaking hypothetically here), I might go for the complementary cocktails. My guess is, the change has had little impact on the loads.
As an aside, if I were cabin staff for an airline, I am not sure that I would particularly want passengers whose primary criterion in airline selection is the availability of free liquor.
...three miles from BRONS, clear for the ILS one five approach...