As a native hokkien and cantonese speaker, I feel that speaking dialect to family members feels closer and more friendly than speaking mandarin

However, I also feel like dialects are outdated. In the past when a small river or mountain could separate communities dialects made sense as people rarely interacted with the outside world

However, now that transportation and media is so good, a common language ie: Mandarin seems to have replaced any need for dialects
Do you think dialects should be preserved? Do they deserve to be preserved? Or should we be like Qin Shi Huang eliminating different scripts in favour of unifying?