The Adobe Magento 2 team and the community is working hard at reducing the number of bugs in the Magento 2 product. Despite the effort there seem to always be around 1000 confirmed bugs.
Quite often old bugs reappear and have to be fixed again. A new version have a lot of fixed bugs, some new features, some new bugs and some old bugs.
The bugs are so many that you need to think in new ways and ask yourself: -What kind of bug is best? Unknown bugs or known bugs we learded to live with.