This point has been made in other forum posts in the past but think it is worth bringing up again as it has not been addressed and it doesn’t look as if this is a feature that Asana will introduce.
The portfolio timeline feature should be a great way of seeing as much, or as little, detail about all the tasks you have across all the projects in your portfolio. However, it does not do this. Only milestones are represented on the portfolio timeline which is a MASSIVE limitation and will be why I am planning to recommend that our organisation considers using another project management tool.
I take the point that for very complex portfolios with a lot of small projects seeing all tasks is too much detail - but in that case, it would be simple to add a ‘show milestones only’ option, or filter by user assigned, only select certain projects, etc.
As it is, I don’t see much of a use for the portfolio timeline view. Users have been commenting on this lack of functionality since at least 2020 - not great to see that nothing has been done about it.
Would be interested to know if others feel similar.