I have a OnePlus Pad 3, bought for about $600, and it's great because it can show books and papers at approximately their real intended sizes.

Absolutely great value for the money.

The only downside is the constant nagging about OS updates.

If this one breaks, I guess it is time to learn Mandarin.

Wait... I have a OnePlus Pad 3. What nagging about OS updates?

Maybe you aren't aware because you always agree to the update popups?