Agree, it's dealing with distributed systems all over and handling a very limited sandbox on the client side. I think my sibling comments are completely undere

Agree, it's dealing with distributed systems all over and handling a very limited sandbox on the client side. I think my sibling comments are completely underestimating the complexity and the market value here. Apple Reminders or Google Tasks are customer facing applications for single individuals, nobody but a single client is working at a time on their own data. Businesses on the other hand want their data at a central location and personnel close to the tasks using client applications. They don't want any reliability issues in the client-server-communication blocking the work being done. Heck, businesses want to be able to throw more people at the same tasks and we call it collaborative editing.