I still think my t3.3 concept has merit
I really don't need all the extra pins or MHz of the bigger teensy's, smaller overall size is an advantage
How would that smaller size work, with the addition of a SD card?
For the extra $5, If I need an SD card slot, I'll just get the Teensy3.5
I've just discovered the Teensy3.1 and will never buy an Arduino ProMicro again. Yeah they're overkill for most of what I do, but for the same $20 I can get a Teensy 3.2. For another $5 I can get a 3.5. I can always pick up an Arduino Mini clone for $5 if I need something cheap.