Many people complain that there should not be a level-limit to anvils. However, I have never encountered this issue IF I’m using it properly. I have made the perfect armor / tools with all the best enchants multiple times (on vanilla), and if you combine the books in the correct order, you never reach the limit.
Yeah, excuse me if I don’t want to go to https://iamcal.github.io/enchant-order/ every time I need to enchant a new pair of boots.