Yeah any reverse engineering of closed source code takes time. It's a huge job on its own. Adding the need to avoid actions that may lead to legal issues.

Well yep, It's very likely this may never round to a perfect replacement product.

But it still has value. For starters, it will encourage new open source projects to use it rather than the propria try version, long before it's a direct replacement capable product.

So the effort is worth some excitement. At least a pat on the back and free beer for some of the guys trying.