What do you mean by deprecated? Unsupported dependencies? All the code I've written post-1.0 still compiles correctly (although a lot of it could use an update to use new language capabilities).
I even have a bit of Rust in production at work and I haven't encountered any maintenance issue so far.
Now the ecosystem itself can move pretty fast depending on the dependencies you use, that's true, but that's a different issue. You're never forced to update if you don't want to, you code keeps compiling with newer Rust releases. Compared to most languages I've experienced with, Rust has been very stable post-1.0. And they seem to take that issue very seriously.
The thread you linked might have some truth in it but it seems like the main point is "look, you've had a .2 patch release!" That's not a good thing of course but unless you happened to jump on that new functionality as soon as it got released the impact is rather minor and bugs happen.
I even have a bit of Rust in production at work and I haven't encountered any maintenance issue so far.
Now the ecosystem itself can move pretty fast depending on the dependencies you use, that's true, but that's a different issue. You're never forced to update if you don't want to, you code keeps compiling with newer Rust releases. Compared to most languages I've experienced with, Rust has been very stable post-1.0. And they seem to take that issue very seriously.
The thread you linked might have some truth in it but it seems like the main point is "look, you've had a .2 patch release!" That's not a good thing of course but unless you happened to jump on that new functionality as soon as it got released the impact is rather minor and bugs happen.