Heh, It's funny re-reading a very old thread that I created.
It looks like the last year for the FF was about 1994, with a complete redesign happening sometime around 1995.
In saying that, it looks to me like the only Filter-Flo to have electronics in it was the Infinite Vari-Speed, which I think they introduced in 1966. Even then, the electronics were fairly crude.
Considering that GE kept the same basic design for about 31 years, I suspect that there was too many politics within GE to consider re-engineering their machine.
In the same vein, I believe that it was Whirlpool that introduced the worlds first Microprocessor controlled washer in 1978. (With Kenmore following.) This was obviously a sign that GE was falling behind the times.
More to the point, by the 1970's, I think most people had abandoned the idea of line drying clothing, making recirculating lint filtering obsolete. (Even though, there's no doubt in my mind that Filter-Flo's still work amazingly with pet hair.)
When I think about it, the earliest anyone could have developed a completely electronic washer would have been 1973, using an Intel 4004 CPU. However, I'm sure that it also would have been very expensive and not really economically feasible. (Maytag was experimenting with electronic timers as early as 1963 if my memory serves me right.)
I think it was a shame that GE never really innovated in this area. Maybe it was Jack Welch that caused a lack of innovation within the company. Stacked Ranking is a horrible way to evaluate employee performance. (Gee, so and so is developing a Microprocessor based design.. I'd better sabotage them so they don't get ranked any better than me!)