I've seen this "we're still learning" argument for at least 6 months now and I get it and even agree with it. However at which point do we start to question how

I've seen this "we're still learning" argument for at least 6 months now and I get it and even agree with it. However at which point do we start to question how much is it part of a learning curve and how much is just limitations of the models/software?