That is an optional feature, not required to make use of an LLM. And not even a feature of most LLMs. ChatGPT was usable before they added that, but it can help when you need recent data. And they do continue to train It, with the current cutoff being April of this year, at least for some models. (But training is expensive, so we can expect it to be in conjunction with other design changes that require additional training.)