I working right now on a wearable project using Teensy 4.0 with the Audio-Shield, W2182B and some sensor...
The Project has some complexity using dynamic rewiring audio connection, create light animation, that are in sync with the sound and
so on... .
My question is what features of C++ can we use with the fastest microncontroller of wolrd : Teensy 4.0 with the Power 600Mhz and 1 Mb Ram that where not possible with slower microcontrollers without impact on code size or on speed.
1.) Interfaces -Pure Virtual Functions
2.) Smart Pointers
3.) Dynammic Allocation...etc.

I hope you got the point...