Great testament to Honda longevity! Nice to hear someone enjoying a particular machine for so long.
I still own a 1962 CB77 that I bought used in 1966; but, I don't ride it anymore. It hasn't been as maintenance-free as your CB750 nor has it nearly as many miles on it; however, it never left me stranded. I like to keep things a long time - I also have a 1965 Healey 3000 that I've owned and maintained myself since 1969. I drive it every summer, but it doesn't have your mileage on it either. I suppose in 1969 I should have bought a new CB750 instead of the Healey. I would have paid about the same or maybe even less.
Honda still makes great motorcycles - I have a 2003 GL1800 that I bought new in the fall of 2003. It currently has almost 70,000 miles, or actually 112,000 Km on it, with (knock-on-wood) no problems or engine repair required. I haven't even had to adjust the valves yet! Just the regular oil and filter change every 10,000 Km, which actually is more frequent than what Honda calls for.
So, hats off to you Ofreen! You definitely have the right attitude...and the bragging rights.
You have my "seal of approval".