Because it's old (over 10 years old), works well, battle tested and practical.

Trello allows for great collaboration and informal planning, even for daily life and for a single person. It allows capturing great deal of information under a card and showing a great deal of information without overloading your senses.

So, in short, "It works (TM)", and works well.

If those are your pros for Trello then you probably would love Notion. Cards are just pages which can capture anything.

Thanks for the offer. :)

Actually I have an integrated system which enables me to collaborate with many people on Trello, and my knowledge base is on Evernote for a very long time now.

I consider moving from working systems to other stuff just because it’s new and hip harmful.

Isn't it the other way around - Trello has been around and used for informal project planning for years before Notion became trendy.

I hate notion, it's really for documents.

Trello is much better for lists and Kanban boards. The UI just works a lot better than Notion which is just a mess and ugly for such uses.

Not everyone Notions. For everyone else... Jira.

UX feels better - Trello is faster and more lightweight than Notion.