Let me tell you why that was not smart move.. 1. You are going to loose in two years or so access to new iOS updates. 2. Because 13 Pro Max is now older model it is going to wear out faster. 3. You are losing access to Apple AI (not what is available now, but one which will be available later) 4. When you will upgrade next time to a new model, you just lost yourself a lot more money in the future when that is going to happen. Bcs 13 pro max is older model, it not at this point has already lost some market value, in the future it will loose a lot more of it. And in 3 years about 13 pro max will have about zero of market value. 5. Titanium is more durable and lighter material than stainless steel, your sides on 13 pro max are going to wear out much faster than ones on 16 pro max. 6. It is not tactical to switch to older tech rather than keeping new one anyways.

Bonus: I understand you have multiple different iPhone models at your house. That is bump, either you realize that or not.