There is IMHO no such thing as old being better than new.
There are, on the other hand a lot of different types of skin, and a lot of different type of hairs.
And also, there are a lot of different levels of manufacture quality.
What is good for you might be bad for another, and the opposite can also be true.
I never ever use a Thiers Issard razor, the feeling of shaving with ones feels like "cardboard", I just hate it.
At the same time, I've prepared TI razors that have become immediately loved by their new owners.
While I am an oldies lover myself, I have a good friend who is a remarkable specialist on steels and love hard steels for his razors, with, if possible a paper thin edge. While both think that the other has remarkable razors, we have a few times traded blades and stuck to our initial preferences.
And as I was saying, quality matters. A bottom shelf razor compared to a top shelf, whatever the epoch, can't be compared.
To take an extreme example, compare a circa 1820 butterfly razor to a circa 1820 Pradier, both from French makers, and you have compared apples and oranges.
Most of the time though, it's not that extreme lol.
What can play in favor of the oldies, is that the very nice ones were kept safe while the shittier ones ended as tools (one I was given was used to castrate pigs), and nice models can be obtained for a bargain