Wow, an Espressif device with a RISC-V core would be amazing, even if the power consumption/efficiency weren't quite top-notch. I'm not willing to put in the effort to get a deep knowledge of a brand like Tensilica when there are options like ST's or TI's ARM Cortex-M chips that blow it away in terms of peripherals, power, compatibility, tooling, etc. But an open standard has all kinds of ancillary benefits.