Rust on rims bad ?

Dear community, I have seen a Dodge Challenger model in person in Berlin today at a dealer. There were several challengers on the parking lot. They were mostly new cars. However, I noticed that I was German visible on a specimen that I liked on the rims rust. Now I wanted to know if the bad thing is. Of course I know that you can remove rust on the rims with appropriate means/solutions but I have read I’d like to hear your experiences about when rust can become dangerous or if it never happens and you don’t have to worry about it. I’d be very happy if you could share your experience with me. Otherwise I’d like to thank you very much for the fact that it’s always important how far the rust has already prevailed on the metal. Rab and welcome you. Greetings to Alle aus Berlin