Wha?
They intended for the 8 to lead into a new 7. They did not get the 'concept' correct. If you recall, their "concept" was way down on power and way up on oil consumption and engine warranty claims. The 4 seat / 4 door deal was an attempt to lure buyers who would have a hard time justifying a RX7 to the wife and insurance company but wanted that sporty rotary that they remembered from the FC / FD years. (Everybody understands what naming sequences are used for cars, so I hope you weren't seriously trying to lecture somebody who has owned the majority of cars you listed...) Mazda was trying to maintain its "enthusiast" image (zoom zoom and all that) and this time period was the start of its decline. The lackluster performance of the RX8 is a big reason as to why you have yet to see anything other than a 'concept' rx7...
There are many similarities between Mazda and Honda... as many see Mazda as taking the same road...
- Former "sporty" cars being replaced by more mainstream versions...
- Halo cars that have been in some phase of development or another for a decade...
- Disconnect with the enthusiast base that made it popular to begin with...
I'm not talking about Honda there... but I could be... Mazda fits the bill just as nicely. Cars like the MS Protege, MP5, Miata, MS Miata, 323 GT/GTX variants, MS 6, 626GT, etc... All either dead or now just a vanilla car, produced for the masses...
The miata was praised for its entire career, up until the new, more 'comfortable' style was unveiled. RX8 was a huge disappointment for anybody other than a rotary fanboy. Mazdaspeed is a joke. They only thing that mazda seems to be pushing the envelope in these days is their styling... if only they weren't convinced people wanted to drive cars that resembled the Joker or a blowfish...
The point is, Mazda used to be right up there with enthusiast loyalty... while not always as 'popular' as Honda has been, they had quite a long run of getting things right. Now, just like Honda, they have been snuck-up on by competitors that realize that there is quite a market for customers who simply don't want a civic / accord.