With the quality of that software, it wouldn’t surprise me if the driver didn’t work without the userspace app at all. The GeForce experience at least you can disable, but if you have any branded components getting all of their management software off your PC is incredibly difficult

Logitech M720 Triathlon is currently listed €64,99 at their site.

The "programmable buttons" on it works through the user space app which is needs to be running in order to intercept and replace the button actions.

No app running? No replace.

App is stalling because the CPU was busy? No replace. (EDIT: or no action at all, lol)

Is €65 mouse could store the less than a 1 kilobyte of the settings on itself? Of course not.

On a third day I just turned it off and went for the other vendor altogether.

To add an insult to an injury I knew the software would be mess so I installed it on a notebook relegated for the 2nd line duties. Less than a year later the notebook started to cry what there is no space left on the disk - which was quite strange because there was nothing what would fill up quite a plenty of a free space.

Well, every month or two the Logi software (which I no longer even used because I didn't use the mouse) downloaded ~1GB update, stored the update, installed the update. Never cleaning up nor the updates nor the previous versions. Tens of GBs of a useless software just for the sake of the process.