I was once at the exact same point where you are now. Marlin+octoprint really is good enough for most cases once you’re up and running.

I pulled the trigger for klipper a couple of years ago and honestly never looked back. Mainsail is just so much more refined and usable than octoprint. Tuning Firmware Settings in klipper is so much simpler than marlin, it’s just a breeze.

Combined with modern controller board (f.e. mks skipr), modern drivers like TMC2209, sensorless homing, Canbus-toolhead, resonance measuring, mmmh… chef’s kiss ;)