From my own experience with rim and mechanical disc brakes.

It all depends on the use condition.
The only time I feel that disc brakes are an advantage is with long steep mountain descents.
The modulation is better and less likely to 'arm freeze' gripping the brake levers too tightly that it compromises steering.

I ride in the rain/wet and over here in the center of the Equator, it rains every day or other day, so wet riding is hard to avoid.
Never found rim brakes to be inadequate in the rain/ wet.

I find rim brakes easy to service and adjust.
Mechanical disc brakes with 2 actuating brake surfaces are still ok to adjust, but less margin of error.
Too big a pad to disc gap and brake lever feels whimpy; Too close a gap and there is chance of rub.
Hydraulic will make it worse since it 'auto' adjusts that gap, so if you end up with brake rub in the field, its a very painful process to solve it (esp. over here where it usually means being in the 35-38degC Sun with RH of 85% or more )

Being able to use many tire sizes is a big plus for disc brakes.

IMHO, I'd just buy a bike if I like it and the type of brake is a non-consideration