Comment by ams6110

"Software lifecycle tool" is too vague for a product to have focus and open to too many interpretations as to what it should include. Even limiting scope to issue tracking, there are different points of view on how that should work and several widely-used but rather different software alternatives to choose from.

And how many teams spend the first three months of a project building a custom issue tracker because they don't like any of the off-the-shelf options? Trying to get issue-tracking "right" is a black hole for a company like github. Which is probably why they provide the bare minimum free-form issue and that's it.