Apple just announced some new hardware recently. Phones are mostly boring these days. We can confidently predict that features continue to be refined and the experience gets faster but what if Apple dedicated a little more resources into fixing things that just don't make sense?
The first iPhone came out in 2007. While I was not an original iPhone user, I did join much later and have remained loyal to their ecosystem. My circle of friends with iOS has grown and like many people, texting has become my main form of communication to keep in touch and express myself.
Apple added the feature to delete old messages in iOS 8 (2014). It's over a decade later and this feature has not evolved. The limitation with this feature is that it is global. That's not how communication works when you consider your spectrum of contacts: close friends, acquaintances, businesses, and service messages (2 factor).
The options are limited to keeping messages for 30 days, 1 year, or forever. For all messages.
If you have a significant other, you might consider ever message received a precious artifact of your relationship. I'm guessing you have people you chat with regularly for years and sometimes you want to review past messages for any number of reasons: when you announced news, a pic of something exciting, a moment some hot gossip was sent, etc.
You might also have a group text where nothing super intimate is ever shared but there is plenty of media being sent for the purposes of entertainment. A family chat might include pictures of your niece sent by your sister. We know your sister probably has these pics and can always reshare them later.
I suspect if your family group chat is like one of mine, you also have a person who shares 50 pictures while traveling for no matter how ordinary the trip may seem. These pictures are lovely updates but not necessarily something we need to hold onto on our phones.
Yet another possibility: you have a group of friends who doesn't chat often. Once a month, once a quarter, or maybe just some quick updates around everyone's birthdays. This isn't the kind of chat that takes up much storage. Why rush to delete it?
If you're following my illustration, you'll probably see the connection. I might never want to delete messages from my spouse's chat. I might not care to keep anything from my family's chat more than a month. For my friends I keep in touch with casually, I think a year is just fine.
We need this granularity from Apple. Different settings for different chats!