What are some things that will not go obsolete soon, but are becoming less common?

I just wrote thank you cards for a bunch of people that while becoming less common, everyone appreciated them. I feel like nowadays, everything is digital like thank you texts, emails, and so on. I feel like this is one example of something that will stay with us for the foreseeable future since some people prefer the penmanship of writing a thank you card. What other things do you think fall into this category?