TPL seems fine in documentation but I found it very hard to be used in real world scenario. Wiring evrything to single input-output or using dozens Join blocks to achieve data structure you want for some blocks was not pleasant. Also finishing pipeline in the right time is also not that easy. Either blocks were not finishing at all or finishing too early. I end up writing my own flow library that is much easier to use for simpler pipelines, yes not so versatile and does not allow spanning multiple inputs across multiple blocks, but at least it does what it supposed too.