* Advanced Roadmapping - JIRA will, given a pile of issues, sort them and fake-assign them to individuals on your team to determine how long it will take you to complete a project. This is way more powerful than burndown charts and cycles when you're planning a hardware project with a tightly-defined deadline. Without it I have to drop back to spreadsheets to provide any insight into when a project will be completed. It's especially important when the business peels engineers off the project.
* Time-based estimating - JIRA lets me plug hours in for estimates instead of railroading me into T-shirt sizes, which means I can actually use the tool to give an accurate estimate of when we'll be done. Linear requires you to calibrate your expectations by running a few cycles first, which makes it a really bad fit for projects that have a defined end date.
I think Linear has a lot of potential for teams that don't work to fixed deadlines, but for my purposes it's just a very fast spreadsheet.
I'll check out Linear. Been looking at Clubhouse too.
Very DIY. You can build great workflows if you put the effort in. Brilliant reporting, main reason we adopted.
Clubhouse for example gives the agile structure (epics, stories etc) by default and you conform to it. Minimal setup effort. From a 'management' perspective I actually like monday, by the actual end users don't seem to like it.
Getting a true hierarchy and relationships requires similar thought to setting up a SQL DB. Powerful, but I don't think we have the resource to really build upon and support stuff.