On a project I work on* we've found that this technique has worked well so far. We're slowly moving from v3 to v4 by splitting out groups of components into the

On a project I work on* we've found that this technique has worked well so far. We're slowly moving from v3 to v4 by splitting out groups of components into their own packages and upgrading them as we go. We've been heavily inspired by d3's approach e.g. with the use of rollup for bundling. We're probably at about 60% of the library upgraded/split-out but we've yet to tackle the more tricky changes like d3-selection. * https://github.com/d3fc https://github.com/d3fc