First, are you telling or asking a opinion ?

In any case the days of the home brewn programmers are numbered as more and more manufacturers tend to make the details abstract to the general public. And with ISP there, only a guy with absolutley nothing else to do will try to design a "Flash chip writer" whatever it is.

The purpose of designing your programmer at University level has a different purpose academically and the priority is totally different when you want a MCU programmed to be fitted in an industrial equipment. Never try to mix both.

Raghu