Does it matter whether benthic foraminifera achieve clumped-isotope thermodynamic equilibrium?

In many carbonate archives, Δ₄₇ signatures appear to be primarily driven by crystallization temperatures, with little evidence for other influencing factors, implying that ¹³C and ¹⁸O isotopes are effectively (re)distributed among carbonate isotoplogues in accordance with thermodynamic stability during or just before mineralization. This is not the case for all types of carbonates, but appears to hold true for biocarbonates such as bivalves, gastropods, or planktic foraminifera. For historical reasons, things are not as clear-cut when it comes to benthic foraminifera, a particularly important source of information on past marine environments at the scale of the Cenozoic and beyond. In hope of fostering productive discussions, we revisit this issue with a focus on the following questions:

• What is the current body of evidence from modern/recent observations?
• How much do the various Δ47 calibrations currently applied to foraminifera differ?
• Is there any practical difference between Δ47 calibrations based exclusively on modern/recent foraminifera and "composite" calibrations based on many different types of carbonates?
• What should be the foraminifer Δ47 community's next steps to try and resolve these issues?