Are you PhoenixAshe?
The talent requirements remain the same, so you still need a certain amount of both EXP and gold to level talents. However, the gold requirements are typically more time-consuming, so people tend to not find EXP to not be that important in ult. level. Eventually people typically reach the maximum amount of EXP they can store, and then just wait for gold to level up (unless they’re using the gold on other things that they need or things that unlock during ult.)