Because that's where most planners, paper or digital, quietly die. Not from a design flaw, from a habit that didn't fit the person using it.
What paper is genuinely better at
Paper has one advantage digital hasn't fully matched: friction, in a good way. Writing something down by hand takes a fraction longer than typing it, and that fraction seems to help it stick in memory, there's real research behind this, not just nostalgia. There's also nothing to open, load, or unlock. It's just there, on the desk, demanding nothing from you except a pen.
The honest downside is just as physical. A paper planner can't remind you of anything, can't be seen by anyone who isn't in the room, and if you leave it in a bag on a train, everything in it is genuinely just gone. It also doesn't scale, planning a shared trip with four friends on paper means someone owns the actual notebook and everyone else is relying on them for updates.
What digital is genuinely better at
A digital planner's real advantage isn't that it looks slicker, it's that it can talk to other things. It can remind you, sync with a calendar you already use, and be shared with someone else without a photo of a page or a screenshot in a group chat. If your week runs across multiple devices, or your plans regularly involve other people, this stops being a nice-to-have and starts being the entire point.
The honest downside is that digital tools can feel cold. A lot of planning apps are built like spreadsheets with a nicer font, all grid, no personality, which is exactly the feeling that makes people abandon them by February. If an app feels like admin, it gets treated like admin, opened only when something's overdue.
The actual question to ask yourself
Forget which one is "better". Ask instead: when a plan involves someone else, how does that normally go for you? If your honest answer is "I text them a photo of my page" or "I just remember and hope for the best", that's a real signal digital is worth trying, not because it's superior, but because it solves a problem you already have.
And if your honest answer is "I don't really plan with other people, I just need my own week to make sense", paper might genuinely serve you better, there's no shared-calendar problem to solve.
A middle path exists
This doesn't have to be all or nothing. Plenty of people keep a paper notebook for the slow thinking, journalling, brainstorming, the pages that benefit from a pen, and use something digital for anything with a date attached or anyone else involved. Doodlik was actually built around that instinct: notebooks that feel like paper to write and doodle in, sitting right next to a calendar that can sync and be shared, so you're not forced to pick a side.
The best planner isn't the one that wins a debate on a productivity blog. It's the one that's still open on your desk, or your phone, in six months.