So in 1.15, which we just updated to, item frames were optimized and now don't cause any significant fps drops even in ridiculous numbers!!! They now dont cause server lag or client lag!!!! Yay! Unfortunately hoppers and anvils were made significantly worse in terms of lag in the update however but whatever man lets not discuss that... Because of this, I think it would be really cool to increase or remove the item frame limit in shops. What do yall think?