Unlock bootloader now or wait?

[mingkee]

I bought XA1 ultra last week.
We know unlock bootloader will erase DRM and it won't be recovered.
Is there any TA backup method for this model?

 

[oscarcx]

I bought XA1 ultra last week.
We know unlock bootloader will erase DRM and it won't be recovered.
Is there any TA backup method for this model?

Also looking for an answer. I think it is not possible unless people can find a way to downgrade to Android 6.0
But what I am thinking is that if these keys are not important then why not just erase them...