Ask HN: Recommendations for a good Bluetooth travel keyboard?

I am working on the go quite frequently and have a nice “portable workstation” (calling the System 76 “Serval” a laptop seems misleading). I need to cut down on weight a little and no longer want to pack my quite heavy and corded Logitech “PRO KEYBOARD”.

What I am looking for is a lighter alternative that supports Bluetooth and is suitable for coding. The “MX Keys” might work, but I'm sure there must be better alternatives from other vendors, too.