For those of you who have been getting Botox for several years, is your resistance okay?

I've been looking into getting Botox, and I've found that there are surprisingly many people who get it consistently for a long time. However, I'm a little worried because I've heard that if you keep getting it repeatedly, at some point the effects won't be as strong as they used to be.

Some people say that the effects were good at first but the duration shortens over time, while others say that they have been getting it for several years without any problems and it maintains well, so I'm confused about what is right.

Are there any of you who have been getting Botox consistently for several years? I am curious about your actual experiences regarding whether the effects or duration have changed compared to when you first got them.