In 2022, by my reckoning, the Board issued final decisions in 51 appeals from Section 2(e)(1) mere descriptiveness refusals or from disclaimer requirements based on descriptiveness.
Yours truly, the TTABlogger, has once again reviewed the TTAB's FOIA page (now called the "TTAB Reading Room") in order to estimate the percentage of Section 2(d) likelihood-of-confusion refusals.