Platforms
It is very critical to select the right RTOS to achieve the end goals
Implementation
Need to prototype something quickly - Python is the way to go!
Hardware
Choice of development boards for POCs to industrial grade STM32 controllers
Stacks
Not sure whether to use an open source library or build from scratch
Frameworks
To use MQTT or to build custom realtime transport really depends upon the use case
Tools
Using the right set of tool cut down a lot of time in debugging.