> The net effect of this would be that I type "mutable" all over the place
You might want to consider adopting a more modern programming style for the benefit of your coworkers (and possibly yourself). Mutability all over the place is a nightmare, speaking as someone who currently has to work in a large codebase written like that. It's hard to predict what value a variable is going to have at any particular point in your code, since instead of only having to check where the variable is defined, you have to audit all the code between the definition and the use. For the same reason, it's hard to guarantee that your invariants are maintained, since there is a much larger surface area to check.
> You might want to consider adopting a more modern programming style
Just because some people think a particular style is useful doesn't mean everyone does. You might want to consider checking your biases before making comments like this. I understand the (many) arguments for using `const`, and I've concluded (for myself) that it's not a useful construct. Read and internalize the rest of my previous comment for more information.
It's not about biases. Using immutability is not just some personal preference. It's common knowledge that mutability everywhere is a bad practice. That's why there's a trend toward immutability by default in newer languages.
You might want to consider adopting a more modern programming style for the benefit of your coworkers (and possibly yourself). Mutability all over the place is a nightmare, speaking as someone who currently has to work in a large codebase written like that. It's hard to predict what value a variable is going to have at any particular point in your code, since instead of only having to check where the variable is defined, you have to audit all the code between the definition and the use. For the same reason, it's hard to guarantee that your invariants are maintained, since there is a much larger surface area to check.