[fhfjfk]

I think it's to add logic to an existing COTS device.

Say you have a widget that both writes log files to an SD and reads a command script from that SD. With this FPGA card, you could implement logic that changes the command script based on the content of the logs.

[utopcell]

No you can't, there's no meaningful storage on this pcb. Besides, you could do the same with a dirt-cheap rp2040 or similar cpu. What's the FPGA added value?