We talked about this on technic forums

Sorry for the pseudoart, it's just faster than writing an essay on filler mechanics.

Current filler mechanics are:

• loop mode disabled (as opposed to classic BC)
• do not wait on entities to leave work area, skip blocks (as opposed to classic BC)

Probably a poor choice of words on my side.
Example: building a simple 2x2x2 cube with gravel.
Currently when the work is done the filler shuts down and if you break any block the filler does not try to rebuild it.
In 4.2.2 and 5.0.x the filler does not shut down and loops indefinitely and rebuilds any missing blocks.
Usage: filling quarry holes with gravel/sand and self-repairing bases.

Edit: no gates in both tests.

What do you mean as opposed to classic BC? Filler never had loop mode on by default, you had to enable it using a gate.

No. We plan to do this another way.

@asiekierka The pseudoart is just a reminder. The final implementation is up to you.

Now #2268.