Thank you for taking the time to respond to my ignorance!! Very much appreciated.
I was beginning to run up against memory limits in my Arduino so in searching for something with more memory I stumbled across the ESP32, wow, what a powerhouse.
I'm beginning to understand now, from everyone's answers. Accordingly, I think even the 2016 would not be sufficient for ESP32 signals as they run at up to 240 Mhz, so I'd need the 5016 which runs at 500 Mhz. if I'm understanding this correctly.