Finally jumped on the Teensy 4 bandwagon. Just received a couple of 4.1 boards, and two 4.0 boards. Tried compiling a T3.6 robotic project on the 4.1, but got this error related to my Random Number Generator (RNG) function:

'SIM_SCGC6' was not declared in this scope
I did found this thread by @manitou:

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Is that the latest on RNG for Teensy 4? Couldn't find anything on the official Teensy library site:

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Is the T4 RNG really slower than the T3.6?