What's your biggest time sink as a data scientist?

I've got a few ideas for DS tooling I was thinking of taking on as a side project, so this is a bit of a market research post. I'm curious what data-scientist specific task/problem is the biggest time suck for you at work. I feel like we're often building a new class of software in companies and systems that were designed for web 2.0 (or even 1.0).