The never ending 63/64/65 bucket seat discussion makes you wonder how General Motors ever survived the sixties. The lack of forward planning and execution must have cost a fortune. Let's not even get started on how they were completely caught flat footed by Ford and the Mustang in 1964.
The 1965 Chevy II was basically a one year car. Was it always planned that way? Who knows, but surely the new styling of '66 had been on the planning table for awhile. To make the 1965 SS bucket seat and console different from earlier models for one year is ridiculous. All they had to do was leave '65 the same as '64...63/64 bucket seats with no console in 4 speed cars....PGs get the 63/64 console. To make it slightly different they could have changed the seat cover pattern. But no, they decide on a new console that ends up to be too high/wide for the 63/64 bucket seats, so they redesign new '65 seats to be slightly narrower...for one year. In the end, the console becomes one year, too, because it's about an inch too high in the front to clear the following year '66 a/c evaporator unit. Bucket seats and console become one year '65 items and everything is new again for '66. Expensive stuff.
In 1965, Chevrolet had nothing to compete with the Mustang. If the changes to the '65 Chevy II were an effort to try and fill that void, it failed miserably. We all know how Mustang sales went. 1965 Chevy II sales were down almost 70,000 units over '64 and there were 1500 fewer super sports than 1964s dismal total of 10,500.
I'm not sure much has changed at GM. The 2019 Camaro SS was introduced to such extreme dislike for the front end design, they had to change it mid year. This can't be inexpensive, and was a further detriment to already sagging Camaro sales that have even worsened since then and may result in the end of production after 2023.
On the plus side, GM has hit it of the park with new Corvette C8....if they can figure out a way to keep the front hood closed