It is a WhatsApp group, or a Google Form, or a sheet somebody's senior owns. The group scrolls past the thing you needed. The form's replies sit in a spreadsheet one person opens. The sheet leaves with them when they graduate. Next year's batch starts from nothing.
With Vakh
Each of those becomes a board. The mess catalogue has photos and ratings people actually left. Lost and found has a map. Notes sort by subject and semester. The fest gallery is public, so people scroll it instead of a folder of screenshots. Your club's roster is a badge, so it survives handover. Everyone here posts to the boards that are open and reads the ones that are public. Next year the batch below you inherits all of it.
Boards, not scrollback
Each board has its own fields and its own rule about who can post. What you wrote in March is still findable in November.
Your campus, not the internet
Being on campus is what lets you post. People a kilometre away see it; the rest of the world does not have to.
It is there next year
Freshers arrive into a campus that is already full. Seniors leave with their own work.