I've been working my way through a more thorough read of this JGR: Solid Earth paper - it's an excellent read, both for the science and the approachable writing.

Rose, Zhang, and Swanson-Hysell develop an approach to estimating plate motion relative to the spin axis (not quite absolute plate motion, but close if you neglect TPW). The most important part, in my opinion, is that their method produces uncertainties organically (as an advisor used to say, if your result doesn't have uncertainties, you're doing math or philosophy, not science).

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JB023890