Why would you recommend against using it when your issue is that you didn’t want to pay for it?

Notion has been free for personal use with unlimited blocks for a year or two now.

That restriction is gone. Notion is hands-down the best note taking system I've ever seen/used.

What makes it best at note taking in your eyes?

Not OP, but it's definitely the incredible flexibility of the system, especially the databases.

I basically track everything, from sideproject progress, CRM, personal challenges, workouts, books read, personal expenses, whishlists and todo with Notion in an unique way. While I'll be the first one to admit that the flexibility can be overwhelming sometimes, for basically every common usecase there are templates or YouTube tutorials

I agree with all of this, and I want to add that it's truly cross platform. Their web app is the same experience as their native app (this suggests electron but I'm not an electron hater and the native app is not a resource hog). It also has native builds across platforms, including mobile which is also well done.

There are other good note taking apps out there and there, and there are other note taking apps out there that solve the device problem I struggle so much with. But notion is the best note taking app with the best cross device/platform support I've come across.

I first encountered Notion in May 2020 and immediately fell in love with it's flexibility. I can organize and connect my thoughts/notes without the application getting in the way.

Linux, Windows, Android, Web... the service performs excellent across all platforms.