You could be right, but if that's the case then either these alternate implementations do not pass all of your consensus tests (in which case they are definitely at fault) or the bitcoin core product must be considered to have one or more serious bugs in either the code or the consensus test suite.
Bugs are acceptable in consensus code. English has plenty of exceptions in grammar and spelling but as long as we follow them we understand each other.
I would bet any amount of money that none of the complete reimplementation that I am aware of are consensus consistent.
If you're doing something for educational purposes, then obviously the stakes are less severe. If the prospect of inventing novel ways to assure consistency excites you, then you should do so enlighten the world... but if it doesn't, why are you implementing a Bitcoin full node? Effectively, achieving consistency _is_ the tasks, if you don't enjoy that tasks you'd probably be better of finding a project to work on that where you do enjoy the work of it.
I'm implementing a full node for a couple of things. 1. to make sure i have a complete understanding of the implementation that goes beyond reviewing code. For me, it's like reading a book versus writing one. 2. all the implementations i have seen follow a similar logic specially wrt blockchain management and scripting. i wanted to do it my way to see if it's better or worse. 3. i'm aiming for short. no wallet, no mining, no dos protection.
These goals in mind, it is clearly not fit for wide distribution. It's working fine though - being able to sync up from the beginning while validating, holding a mempool content identical to the core client and etc. But it's reaching a point of diminishing returns. The consensus rules I know I'm not implementing add weight but aren't particular challenging. So I was thinking about looking at another guy who faced the same problem to see where the road ends and whether it's worth going the extra few miles. If no one is consensus consistent then I need to revisit my plan.
