This is exactly what we're doing now. Some of the problems we've seen thus far is how to maintain packages but allow for high-iteration development. It is cumbersome using a packaging service, so at best it's being able to decide what to keep in a shared rep, versus things that are being rapidly developed in it's own rep. Any component that needs specific tweak then becomes duplicated and sadly, code-reuse and maintainability suffers.
Another problem is tracking down inter-component bugs, especially if the code is behind a repository. How am I to make small tweaks? Bleh!
I haven't digested what Webpack 5 is doing, but I'm skeptical, mostly because I don't like Webpack's plugin implementation.
