it is when im busy purging the world of the useless other cultures
Sounds like a personal problem. At least do it with a superior culture, like Gothic.
it is when im busy purging the world of the useless other cultures
It's not useless. If you give up mainland Europe provinces and core all of Ireland you will accept Irish culture. 10% was mostly useless but 20% isn't.
It is useless when I culture convert them.
Then don't convert them. If you're planning to conquer a lot of mainland provinces you should convert them but it at least it gives you a lot more time before needing to do so and it helps with the reformation. A lowered acceptance threshold of 20% is going to be useful throughout the game though if you are conquering provinces. You'll accept Cosmo 20% sooner for example.It is useless when I culture convert them.
It is useless when I culture convert them.