What benefits does Zebrad have compared to Zcashd due to using Rust?

[Shawn]

You basically summed it up. Bitcoin codebase is antiquated and time consuming to maintain and upkeep.

Rust is a modern language that interfaces better with todays world.

Have a read though this thread, others asked the same question:

Zcash is Moving to Zebra!

Following conversations at Zcon4 in Barcelona, the Zcash Foundation (ZF) and Electric Coin Co. (ECC) are excited to announce that we’ve agreed to move core Zcash protocol work from zcashd to Zebra! Zebra is a brand new Zcash full node implementation written from the ground up in Rust. Both the ECC and ZF teams believe the modern architecture and good engineering in Zebra will provide a safer and more efficient implementation of the Zcash core protocol. Zebra was created by ZF w…