Didn't Technics make incremental upgrades to their TOTL range but still went broke?

My own interpretation of why Yamaha make so many models is so that they can attract the customers who don't already have a Yamaha or maybe those who used to own one of their models a while ago (like I did in the past as my last Yammy was a PSR8000 before I got the T3). I don't think Yamaha are specifically aiming their ranges always at owners who already have the latest model, eg, I wouldn't be surprised if many T3 owners don't upgrade this time around but probably attract T1 owners or earlier to take the plunge as well as people who have been attacted by Yamaha but own something else.