What do people use Atlassian for these days? Back in the day we used Jira a lot. But we also had GitHub accounts. The integration of the two wasn't great so we

What do people use Atlassian for these days? Back in the day we used Jira a lot. But we also had GitHub accounts. The integration of the two wasn't great so we switched to GitHub issues and kicked Jira to the curb. This saved money and also a lot of hassle in trying to keep the two in sync. I am wondering if many others went a similar route. We did use Confluence and I do miss it. I would love to find an opensource replacement for it that stores files in markdown format. Like Obsidian, but for teams.