First, the RAM is up to 16GB of LPDDR4X-4267 SDRAM. As someone who grabbed a handful of units with 16GB of RAM when they were released back in January, I can honestly say that the power and versatility this amount of RAM offers is worth the money, and I can understand why it was chosen for the 500+. Whether you're building a system to handle AI workloads or run a browser with loads of tabs open, this is what you need.
There's a lovely device called a PiStorm, an adapter board that glues a Raspberry Pi GPIO [General-Purpose Input/Output] bus to a Motorola 68000 bus. The intended use case is that you plug it into a 68000 device and then run an emulator that reads instructions from hardware (ROM or RAM) and emulates them.
Unlike many handheld devices that force you to choose between typing and tapping, KeyMO gives you both. It feels like a mini-laptop that can still slip into your bag.