One can do more stuff with Tasmota and Berry language (which also looks like Python only with useful end statements) or Arduino, NodeMCU, MicroPython than what this platform offers at this time. I2C and SPI drivers, everybody has that. If one wants to do serious stuff they would use an appropriate RTOS and program it in C. MongooseOS does more than this if we're talking ESP32, also other devices, Javascript, C, C++, commercial support, cloud based OTA upgrades and integration with AWS, Azure, Google and IBM Watson IoT cloud services.
Not quite sure if I follow what you're saying. As in Tasmota/Berry do or do not do more than provide I2C/SPI?
> If one wants to do serious stuff they would use an appropriate RTOS and program it in C.
It's unfortunate, but still largely appears to be the case. I find C very time consuming to program, so I ported Nim to FreeRTOS [1]. It's _very_ nice being able to go from writing highly optimized ISR functions to high level JSON parsing in one language. Add in defaulting to memory safety but with no pause-the-world GC. I tried Rust but it seems more difficult to integrate into existing world RTOS'es, flashers, Swagger debuggers, etc.
Though, I've been curious what running a WASM VM would be like? One could integrate any language: C++, C, Nim, Rust, etc. Would be interesting.
> MongooseOS does more than this if we're talking ESP32, also other devices, Javascript, C, C++, commercial support, cloud based OTA upgrades and integration with AWS, Azure, Google and IBM Watson IoT cloud services.
MongooseOS does seem interesting, but very targeting a niche market with prebuilt needs? For future RTOS'es I think ZephyrOS [2] has a lot of potential given it's now supported by NXP [3], TI, and others but is independent of any given (cloud) vendors or other IoT companies. Some might not like the CMake based build system, but in my view all the RTOS build systems are terrible in their own special way.
Tasmota has drivers for almost anything you'd imagine. Adding I2C or OW sensors for instance is mostly plug and play. If you wired them correctly and used tge appropriate image they would just work. Berry is an addon scripting kanguage that runs on a VM. It's only present in the ESP32 dev branch.
Zephyr is nice and well documented but support for ESP devices is quite lacking. For NXP devices it's great.