>The Debug Probe adds on SWD and has a separate port for that, so it competes also with SWD devices like this knock-off of the SEGGER J-Link BASE Debugger, which costs $500!

I think a better comparison would be something like CMSIS-DAP (which also gives you JTAG)

https://www.l-tek.com/web-shop/cmsis-dap-debug-probe/