What is your experience installing/using Linux on a Mac machine?

I tried using mklinux on a PPC (a Performa, maybe?). I don't think X worked at the time, so it was strictly text mode. "Text mode" I should say: there was no 80x24 text mode so it was eg, a 640x480 bitmap using pixels to render the characters to draw the console. Which looks nicer and is more flexible but much slower.

I once tried Linux on an old G4 MacBook (Power Chip - before the Intel chips).

It was just as slow using Linux as it was using 'Tiger', and also some peripherals weren't supported.

For what it's worth, Linus used to use a MacBook with Linux. But that was several years ago. I don't know what he uses now.

I used rEFInd to install it on my Mid 2015 MacBook pro last year. It works great. I heard theres some custom configuration needed for the touchbar in the newer ones though.

what are your concerns?

linux runs fine on a mac. given the limited selection of hardware variations, it is less likely to run into surprises. as far as i could tell all peripherals on my mac are working. the boot manager refind also works well.

the only thing you need to do after installation is to configure the touchpad to support 3 mouse buttons. once that's done, linux on a mac is a great experience.