Next up, Leetcode for VHDL/Verilog. Heck what's stopping LeetCode for LtSpice/Altium/Solidworks. Create artificial Supply crunch and You have the exact same scenario playing out in Software engineering field where candidates jostle for "highly competitive jobs" where they are put through a hazing routine called "white board interview". I visited the SAC Goldrush museum recently and came away from this fact embedded deep in my brain" When there is a goldrush, always sell Shovels". You seem to have trailblazed that path for me. So Thank You!