Gradebook NG uses HandsonTable 0.26.1. There have been 6 releases since then and this is almost 1.5 years old (as of Dec 2017) and hundreds of commits out of date.
However there were some concerns by Payten about performance for a newer version and it's not a drop in replacement as the "WalkontableViewport" that they were using to patch this has either been removed or changed. Remaining on an older library version has risks going forward for both browser compatibility, features and performance.
Thankfully we haven't modified any of the HOT code.. directly.
Prior to contributing the new table changes we did look at upgrading HOT, however it's performance on large data sets was far worse and we didn't have the capacity to restart our performance profiling and development/QA process again. We spent a good amount of time profiling version 0.26 and identified a few performance bottlenecks, which we were able to monkey patch without degrading any features:
So my only reservations in upgrading would be the possible performance degradation on large datasets (e.g. 100s assignments, 1000s students); do our current monkey patches still apply; after profiling are there any new bottlenecks; and does everything else still work