Hi.

First of all, I highly appreciate arduino-cli. It's a very, very big step forward in integrating into my development workflow, especially when you don't always have a graphical session running.
Not having Java around is a nice thing as well.

I do miss support for external programmers like a USBasp and friends, however.
While the Arduino bootloader is quite handy, sometimes it's not an option.

While I might have missed the option, I only saw the option to specify a port, not a programmer.