Worst ideas/features in programming languages?

[data pulverizer]

On Wednesday, 29 December 2021 at 20:07:20 UTC, data pulverizer 
wrote:
>
> For me there are two main ones:
>
> * A lot of people have said this one but I'll +1 it. Tuples 
> fully built into the language with destructuring and all the 
> common features. A year or two ago I thought this was 
> definitely going to happen.
>
> * Relaxing policy on symbolic and 
> infix/prefix/postfix/binary/unary notation, perhaps having 
> protections against using obvious things like "." but 
> relatively free elsewhere. From a science/math point of view 
> this would be great, and it can greatly improve code 
> readability in such applications.

One more thing, native string interpolation similar to f-strings 
style in Python or Julia style strings for example

```
auto my_variable = 42;
auto output = "The meaning of life is ${my_variable}"
```

I think this also seemed like it was in the works a year or two 
ago.