enoughtohold:

if you really think that by 30 (or other arbitrary age) people should stop having unusual or fun/silly interests like you have and should care only about taxes and briefcases, i hope you can cope with the fact that you’re extremely unlikely to meet that standard when you reach that age (which you will, sooner than you think)

if instead the idea is that by 30 you should be living a fuller life and you really see using tumblr (or whatever else) as incompatible with that, as a drain on your happiness and a waste of your limited time, then stop using tumblr now. live a full life now. there’s no need to put it off.

don’t postpone joy, and don’t expect yourself to become joyless. don’t count on transforming into a wildly different person in the next few years. looking down your nose at people older than you just alienates you from your own future. own your future and yourself, and be who you want to be.