If you have high security demands, sure. For most normal people who don't care then a sensible choice is just making sure your current iPhone is up to date and such. Using the latest device you possibly can all the time is either a luxury choice or a high-threat one. Regardless, this is an extremely significant security upgrade. If people believe they are a potential future victim for targeted attacks and require an Apple device, they should use iPhone 17 and future iDevices that support this.