I find zipline to be interesting and so is the companion project treehouse. My main problem would be basing an application off of it at any company that isn't CashApp. If I start using a 3rd party open source dependency I always consider how vital it is and how comfortable I would be trying to maintain and support it if the creators decided to abandon it. That or how easy would it be to switch to something similar. It just feels risky but I do like reading about it from the sidelines.