We'll see GPT-5 in a few months and that will be vastly more useful information to update your sense of whether the current approach will continue to work than anyone's speculation today.
In a few months, or in 18 months? Mira Murati said this month that the next "PhD level intelligence" models will be released in a year or a year and a half. Everything points to GPT-5 not happening this year, especially given that they've only started the training officially last month.
Right. Given we have so few data points at least GPT 5 will offer a completely new one. That will actually be new information.