I suppose this is the march of progress for you. I first started my journey with Yamaha keyboards with the PSR6700 went on to the 7000, 8000, 9000 pro and then on to Tyros 1,2,3,4,5, and now Genos which I think is the best keyboard produced by Yamaha so far.
I also had a 950,970 and now SX900 which is just great. I wanted a lighter keyboard to take out and one where the keys were not so noisy. I also wanted a little more flash memory for my Blackpool organ voices and other favorites I use. Now we have three right hand voices I am delighted that my Genos registrations work great in it so I have saved a lot of time not having to start from scratch.
Now at 83 I still love to keep up with new features. Keeps the grey cells working.
I would think the 970's will be around for a few more years yet. The Tyros1 and 2 seem to be slowly disappearing but I think there are still a few around.