Double precision has a steep performance penalty so we’re unlikely to switch component width. But the DOTS team has some early ideas for supporting large, open worlds without requiring 64-bit width translation and it’s something we intend to explore over the coming year.
With the revisions to the Transform System in entities 1.0, it’s feasible for users to replace the entire Entity transform stack. So folks who want to weigh the tradeoffs between precision/performance can do so themselves.