There’s been some discussion about what “is” censorship these days. This is pretty close.

The knots client seems to be applying different rules to what constitutes a valid transaction for block construction than for block validation. If the 83/42 byte thing was really a consensus requirement, then knots should reject old blocks that contain them.

But that would put knots users out of consensus, creating a contentious soft fork. So knots only applies the restriction for block templates.

This feels to me like the closest definition to censorship we have in Bitcoin. Applying different rules for block creation and validation.