It's mainly no longer used as much because buyers want R&P (can you say 'Hype') and they tell the manufacturers and dealers this. The manufactures and dealers respond to the customer's wants and desires.

No average driver on the street NEEDS R&P steering... it's like having a spoiler on a pickup truck... it's a bragging tool for people who never actually USE the car in extreme situations. i.e. - My car has X BHP, X ft lbs of Torque, heavy duty sway bars, independent front and rear suspension and R&P steering.

As for the isolation from the road while at the track for me... I'm just fine with that. It let's me concentrate on the apex and exit of the turn I'm in and not focus my attention on some little pebble I just ran over. When I'm more advanced and I'm pushing the car to it's limits at the track... THEN I'll probably NEED that feel.

Until then... I'm happy with the RB steering box.