Espressif is no longer alone in the ultra low cost hobby WiFi SoC space. Pine has started working with the Bouffalo BL602 which seems to be a fairly similar RISC-V powered part: https://www.cnx-software.com/2020/10/28/the-quest-for-a-blob... It will be interesting to see which one gains critical mass in community use.
There’s lots of “competitors” to esp32, pretty much none of them except STM have the software for developers, which makes their offerings close to useless.
The only way to gain critical mass is relentless deep commitment to developer tools/libraries and documentation.
In many cases these competitors actually try to hide their documentation and keep secret how their chips work.
I’d be interested to hear if there’s other chip vendors with software/documentation as impressive as Espressif but I haven’t heard any, except as I said STM.