The difference is that they announced these changes in advance. And even in game they add ! icons to all the vehicles that were going to be moved. This is a big difference between the game and IRL stores. Stores do not tell you that they are going to have a sale next week and that you should wait to purchase the item. Gaijin took multiple steps to inform the playerbase well ahead of the changes.
I had enough time to grind out all the top vehicles in my US and German trees with my premium vehicles so that I could get my max efficiency research points before they were moved out of range of my prem vehicle’s “maximum research efficiency”. I had no issues preparing ahead of time.
They also announced the turret baskets in advance. So what is your point? The jingling of keys worked for you, and that’s fine. You lose nothing with people voicing their frustration at the changes.