Asian messenger apps like LINE are really more of an “everything app.” I use LINE to chat with everyone. In Taiwan it’s a given that that anyone you meet will have LINE. Businesses have a special business line account that staff can use. You can book your hotel, vet apt, reserve a table, etc because every business has LINE. You can pay for things with it by letting someone scan your code or or pay for things online by clicking a link that opens line so you can authorize the payment.
As far as the messenger goes, it works really well. They’ve done the best job I’ve seen at making chat history searchable or let you jump to a date instead of scrolling backwards for an hour. They also allow you to send cute stickers, and they are used constantly.
The amount of personal data left in chats would be worrying for sure. Not to mention security culture is not really tight here. I’ve had hotels ask me to send a picture of my credit card for payment a few times.
As far as other things being compromised, I’d just deauth line from my bank account.
As far as the messenger goes, it works really well. They’ve done the best job I’ve seen at making chat history searchable or let you jump to a date instead of scrolling backwards for an hour. They also allow you to send cute stickers, and they are used constantly.