Is there a release date established? I don't freelance anymore but when I was paying my bills with client work the biggest hold up was always waiting for feedb

Is there a release date established? I don't freelance anymore but when I was paying my bills with client work the biggest hold up was always waiting for feedback or deliverables. When juggling 2-3 small projects at a time, a hold up in one will grind the others to a halt. This seems like a simple system to put in place and enforce accountability.