Need help understanding Whirlpool dishwasher nomenclature and timeline

[superocd]

I am sort of confused with Whirlpool's dishwasher evolution. I've heard the terms PowerClean and Point Voyager (what does that even mean?) thrown around.

What came before those models? I had a BOL Roper in my college apartment that I really liked. It had a wash tower and the rectangular drain in the rear of the dishwasher. It was new in 2005 but the design was very similar to Whirlpool's 1980s models. What about my 2015 Whirlpool dishwasher, what are those called?

What's your opinion on the current Whiplool dishwasher design with the plastic-looking motors? I remember how I almost passed out in shock when I unboxed my Whirlpool and saw the "plastic" motor. I decided to give it a chance and it has done well so far. I'm just wondering if the motor will live a shorter life.

 

[vacerator]

Powerclean

models were from the late 70's through the 1980's. Some have porcelain tubs, later ones plastic.
Three level or 4 wash. This was Whirlpools premium wash system then.
Prior to that, I don't know what they were called other than imperial or mark series. Identified by a sliver lift handle in the center of the console.
Later models have a lift tab under the console.
Lower end plastic tub models had a side mount pump and motor design, maybe Roper models.
These were a two level wash with a telescoping center tower. Some may have been 3 level wash.
The Gold series debut in the 90's and were also power clean designs.
Then came the point voyager, the next to last generation, and first water saving type. Separate wash pump and drain pump. Most now have solenoid door latches. Just pull the door to open.

 

[washerdude]

The Roper you had resembles a Whirlpool Durawash.