74,000 words in Chinese here.
Honestly, when you reach the 30,000 word mark, you reach what you think is the requirement to completing the language. In reality, many people speak and utilize different words in life and you will eventually and always encounter an unknown word. Can say that for conversation, you would already completed the requirement for conversational in almost all cases. But for cases such as tv shows, you would have to go beyond 30,000+ to have a chance of recognizing almost physically all of the words.
It’s equivalent to finishing a video game. Being, 30,000 is how the game ends. But then there is DLC’s, extension packs, and secret easter eggs. That’s what the words beyond 30,000 is for. That’s usually where the extra fun is.
Could debate is that 30,000 is when the journey begins since now you have reached a stage when every word is recognizable but you most likely haven’t heard them all yet since you just reached 30,000.
To your question: Yes it is worth it.