This is not only classic "back in the day, the grass was greener" rant - the industry is changing rapidly, and so do its goals - so the resulting product is … very different, if nothing else.
Yes, but changing the taste of a meal might not appeal to all who regularly go to this restaurant - and some perhaps do so because of the taste of that meal !
The questing then is : Is the restaurant happy with this decision to change the taste ? Can it afford the loss of some long-time customers for a wave of new customers ?
Big companies probably will, because they've got enough "backup money" to absorb their losses, but smaller restaurants probably won't. They would rather try to bring in new things on a much smaller scale.