My current M2 Mini will remain connected to its 6K monitor. My new M4 tiny Mini will go full time portable with me. Currently, I use Luna Display when I head to the library or coffee. I can then use my IPP as a monitor, and the “brick” power supply battery. The battery can power the Mini for more than 10 hours, and I’m guessing the M4 could go 20. A big advantage is being able to switch back & forth from Mac 15.2 to iPad OS. Best of both worlds. My little bag holds the extra power cable, Lightning to USB-C cable, 2 small SSD’s, Magic Mouse, and a rechargeable keyboard. Questions? No need to sell the M2, though I may use that for portable use and keep the M4 on my desk. Win/Win!!