I really like the flexibility of having advanced I/O capabilities on almost any pin, specially when I'm not designing the PCB from the ground up. With the older

I really like the flexibility of having advanced I/O capabilities on almost any pin, specially when I'm not designing the PCB from the ground up. With the older atmegas I find myself sometimes constrained by having to use this pin or that pin for a specific function. A lot of newer chips like ESP32 or the SAMD's are also fairly flexible when it comes to I/O, though maybe less so.