Nothing. Besides hardware (better battery life, faster, etc.) only software has “improved”.

If you are a technical user, the new-ish Linux Terminal is cool. It’s a full Linux VM that you can run on an Android phone. It can even run graphical Wayland apps through Weston. You can enable it by enabling developer settings and then flipping the Linux Terminal toggle. After that, there will be an app called Terminal.

Someone listed one on an online marketplace (sorta like the Dutch craigslist) without a price. It had already been on offer for six days (probably not a lot of interest in ergo keyboards there), so I offered 150 Euro and he agreed.