Update 1.4.0 is out. Here's a quick summary if you're not on Discord or following the changelog in game.
Simulation rework
Machines, belts, and junctions now share a single timing model, the whole factory runs in step
Junctions pass items straight through at belt speed; machines no longer let queues pile up in front of them
Speeds are now defined and shown in items per second instead of tick multipliers, so they stay consistent regardless of simulation rate and are easy to calculate
Direct machine-to-machine transfers (e.g. chained extractors into storage) are capped at current belt speed
Map Section Refresh
Reroll your map: after you've held 100 research points at any point, zoom out and switch to refresh mode to reroll an owned section's resources for a fee. Bad spawn? Second chance.
Factory tools & signals
Extractor throughput: hover an extractor to highlight its entire pass-over chain and see measured throughput over the last 5 seconds versus the configured max (items/s)
Item Signal emitter: type an item code to emit a constant item wire signal, with a live preview as you type, especially handy for upgrade requirements
Order details now have a button to copy the item code to the clipboard
Endless upgrades
Speed upgrades and the money multiplier can now be bought past their previous max (+0.5 items/s and +0.5× money per buy, with rising gold and item costs)
Fixes & polish
Barrel Assembly Infuser no longer locks up when a shorter assembly arrives while color is waiting on an unused input
Research purchases staying in sync after load (tree, badge, and Wire Layer unlock)
Filter Splitter rotated visuals no longer show misleading indicators
Thanks for the reports, keep building!