I find it's (Sol at least, probably also Fable) great at writing Skidl schematics, evaluating PCB layout work and operating lab equipment while testing board (scope, psu, load, debugger)

For reviewing schematic/boards I recently developed something for internal tests:

1. A frontier model (either Opensource or closed source) gets a load of text to review a Kicad project systematically

2. The frontier model can extremely "ask" a cheap Gemini vision model to give it data from datasheets or specs.

Main problem: the quality dramatically hits the shitter done once it falls back to "pdf2latext" due to complex tables.

It was even able to do complex ngspice simulations. But you must offer it all datasheet PDFs.

$1-2 of tokens saved me from $70-80 bugged PCBs.