Just wait until you can't step on your knee at all, then maybe you'll figure out jogging isn't such a great idea. I'd quit while I was ahead if I were you, a total knee replacement isn't fun either. If you keep pounding away at it, the pain becomes so excruciating you will have no choice. Just imagine having that long rod hammered into your bones. And running is out of the question afterwards, unless you want to go through that every few years.
Well, while I have had it scoped twice... the damage to it was very nominal... first scoping actually found nothing... I dislocated my tibula, and they feard I must have had some small tears since there was still water on it months later.. went in and found nothing.. 9 years later, I did get a slight tear when my tibula again dislocated.. this time they went in with allegator clips and cleaned up the small tears and have been fine ever since.
I started exercising regularly again and started on the Eliptical, purely because I didn't want to stress my knee... however I rapidly maxed out in terms of pushing my body any harder with it.. I was being lazy and the machine allowed me to... can't cheat at jogging you either are doing it or you aren't.. no leaning on the equipment for support.
Knee bugged me when I first started, now I get no issues with it jogging on the treadmills...
Main time I feel it these days is when I play basketball on a particularly hard court. And I am not giving up basketball until the basically make me.
If I could find a no impact workout I could do consistently on my own other than running on a treadmill, that I could push myself I would likely do it.. However eliptical isn't challenging enough (same with the stationary bike) and if you think jogging is bad... try the stair stepper... I'm not doing that one ever.. that pust some serious strain on my kneecap tendons... which as you might have guess from having dislocated it twice... I'm not exactly looking to push.