Both apollo-client and react-apollo ship with definitions in their npm packages, so using TypeScript with Apollo isn't a problem.

I don't like the stack. It's way too heavy. If I were building everything again now, I'd go with a standard Phoenix app and ditch Redux for sure and hold off on fullblown front-end frameworks and Graphql.

I'd ship v1 with Phoenix, UJS and Turbolinks, and it would take 1/4 the time. Then, if the project grew to where it needed and could support a larger team, I'd bring in Absinthe, Apollo and then finally Vue.

My main recommendation would be to keep things as simple as possible for as long as possible. Use something like Phoenix or Rails or Laravel and get stuff shipped.