I think it's likely that people who use Trello appreciate the simplicity and Atlassian aren't exactly known for creating simple software (speaking as a past Jira user/admin).
I had the same feeling of "oh well, what else can I use in the future" when I read this post.
You can try https://ora.pm
I wasn't expecting that to be as nice looks as it is. I've signed up for early access. Do you have a timeframe for when it will be available?
This is great! But it's fairly lacking in some features. Any word on release of API docs so devs can integrate their workflow into it?
Anyway. Not sure why some people want to move away from Trello now. Is it that they don't want an identity connection between JIRA and Trello (SSO or similar)?