Cars that are "necessary or useful" is a really tricky topic to discuss because there's so many variables around them.
However, one point that
@dacc10 mentioned, I absolutely stand behind it 100%, which is this:
Would you celebrate it more than the 190E or a Porsche 959? That's the thing: take 6 months to model a car that 99.9% of the players won't care about, and will just be seen as a troll car, or model a car that is on high demand, just like the Sierra Cosworth was? At this point, if they are so slow at modeling cars, better choices have to be made. They can't do what they did in GT4, where they could model all sorts of cars fairly quickly.
This level of updates, will just make it so that people who stopped playing, won't even bother coming back. Some cars are appealing enough for that, and most of the cars in this update are not.
Yet, more people want the LFA than all the cars in this update combined. You can either appease to the majority who wants an LFA in the game, or appease to a minority who wants something like a DS. It's about priorities.
The LFA is not hyped, it's desired.
Putting aside the numbers he used (99.9%), and also the car he referenced as "less desireable", which is the Citroen DS in this case, his point still stands.
PD can no longer afford to model cars like they did for the previous games, as their quality and attention to detail have reached near realistic levels.
So with that taken into account, it's of absolute importance for them to choose the "fan favourite" cars among all the several car categories to put into the game first to appease to, obviously, the majority of the playerbase.
And only after they put those cars in the game, and tick all those boxes, can they have the time to choose other less desirable cars.
And what irritates me the most about this, is that all it takes to do this job, is simply have a website/forum like here GTPlanet as an example, where a large portion of the playerbase is concentrated, to be able to tell which cars we want in the game the most.
Like seriously, do they not have someone doing this??? Are they just randomly choosing cars of their own accord without having the feedback of the players?
Do they lack manpower??? Heck, I can do this for them as a part time job if they want to. I would just make a thread asking people what cars they want in the game (and for them to be specific) and just gather all the data to compile the results and see which cars are "voted" the most, and start from there. Heck, IIRC, I think this forum already has something like this.
Take the Lexus LFA for example. It's, undeniably, a car that quite a big majority of the playerbase wants.
It's a Japanese car, from the company that PD likely has the best relationship with of them all considering it's the manufacturer with the most cars in the game (Toyota), it's a car that even car journalists and enthusiasts drool over for, and yet, why is it still not in the game???
Do they not really know how desireable the car is by the majority of us? I don't believe they are
that out of touch with the playerbase.
And when you talk about the LFA, you can talk about a plethora of other cars. And not just supercars, older classic cars and race cars, prototypes, GT race cars... you name it.
I have nothing against the cars that have been added to this game so far. I believe all of them deserve to be in the game
(aside from VGTs but those are a foregone conclusion that they will be part until the VGT project ends, and frankly, it can't end fast enough) but why have a lot of them come first into the game before the cars, even of the same category, that the majority want?
They have to realize that there's a strength in cars that brings people back to actually play the game.
For example, take this update, instead of the 911, DS and RA272, why not a Bugatti Type 57 Atlantic, a Porsche 959 and ... any far more desirable F1 car?
Priorities... It has been PD's achilles heel since GT7's launch (probably even before, but I'll stick with GT7 for now).