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>esp32-s3

This microcontroller is a beast, currently using it to do dev work on a pi4.

Having two usb ports with one otg lets you do some neat things that would cost $100+ otherwise

If you want to do this at the $1 price point, you can on RP2350, albeit with some limitations. In particular, it maxes out at full speed (12Mbps). The trick is to use the on-chip USB peripheral for one, and connect the other to GPIO pins backed by PIO.

This works today with tinyusb and pico-pio-usb, but I'm also playing with a Rust port which I'm hoping will have higher performance.

$8 ish gets you an ESP32-S3 board with PSRAM, flash, and two USB-C ports. The PSRAM and flash are specifically used for this LLM project. I can't find anything like that with the RP2350 for $1.

Entirely fair, $1 is just the chip, not the board. No question the ESP32-S3 is incredibly good value.

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