I have high 80s-low 90s driver speed with quick transition & started gaming a used XXIO 9 (model circa late 20-teens) 9.5 loft & their S-flex shaft (47g vs. 35g for XXIO Prime models).
It has worked well, with straight flight & low spin, especially compared with my previous experience with their model X in 10.5 (too much height & spin with that combo)...