I got almost all of my wishes granted with RP2350

Can someone explain what projects this can be used for?

It's a pretty generic µC, especially well suited for projects that require high-speed (GP)I/O. It can replace an FPGA in some cases.

DSP extensions and FPU support are also decent, so good for robotics, (limited) AI, audio, etc.

Also great for learning embedded systems. Very low barrier of entry, just need to download IDE and connect it with an USB cable.