After experimenting with iOS 18.1 for an extended period, enabled by Apple Intelligence, I found that it did not meet my requirements. Consequently, I reverted to iOS 18.0 Beta 4.
Despite the enhanced features, my iPhone consistently experienced excessive heat. My 15 PM model, which was recently purchased, has only undergone six charge cycles. I am hesitant to deplete the battery prematurely.
^^ However, I'm using Apple Intelligence on my MacBook Pro and used writing tools to correct this professionally which I am impressed.