This presentation "Porting SIMD to RISC-V Vectors" could be relevant to optimizations for ereaders and web browsers. If I remember correctly, libraries such as libjpeg-turbo, are used in KOReader and others:

https://www.youtube.com/watch?v=mxMEUIFL4xg

A review of the recently available RISC-V development board, Jupiter 2, distributed by Milk V:

https://milkv.io/jupiter2

Milk-V Jupiter 2 is one of the first to ship with the new Spacemit K3 RVA23 processors. The performance of SpacemiT K3 is pretty good and a great development board that is almost ready for daily use. It's a decent option for early adopters.

A few useful notes for new users:

1. Install Ubuntu 26.04 instead of the default OS. It shipped with Bianbu, a distro based on Ubuntu. The default desktop was LXQt instead of Gnome, which complicated keyboard configuration and lacked several features. Switching to Gnome solved those issues. Images for Ubuntu are available from: https://github.com/spacemit-com/K3-Ubuntu-Images

2. It didn't ship with documentation; however, the documentation for Spacemit Pico-ITX K3 is sufficient as it is the same board: https://www.spacemit.com/community/document/info?lang=en&nodepath=hardware/eco/k3_pico/pico_user_guide.md

3. You will likely need a powered USB dock to connect to a display (capable of 65W). The ports for USB-C power and display are combined; it requires the use of a powered USB dock, or similar, to attach to a display. Otherwise, SSH is enabled by default for remote access. Displayport 4K@60hz worked via a USB hub.

4. You will need a 65W power USB-C power supply, one is not included. It can be difficult to determine if the device is on; the product lacks a clear power button or power state indicator. The power LED is only viewable at an angle from within the enclosure. A standard phone USB-C charger will likely not provide enough to keep it running consistantly and may unexpectedly power off.

The new Obtanium user interface is better, updating multiple apps is much smoother now.

@Ken Berry, MD with Joel Salatin of Polyface Farm:

https://www.youtube.com/watch?v=_WWNyC-R90Y

Subtly humorous, "A delightful proof that 2+2=4":

https://www.youtube.com/watch?v=0-pL2J0ZB8g

With Ubuntu 26.04, compiling Firefox on Spacemit K3 was pretty simple and performant. It was only necessary to manually install a riscv build for wasi-sdk. Compiling Chromium on the other hand, has not been as clear. Ubuntu packages chromium, so it isn't necessary; however, it is unclear how it was built. The build process and tools for Chromium seem tethered to x86_64, most builds for riscv may be cross compiled.