Having spent 8 years fixing, building & riding bikes, IME Shimano is more reliable.
Sorry if you don’t like that Mat, but just how it seems in the workshop & out with the guys who race (that I mechanic for anyway)
Have niggles with both, but seem to replace more actual broken & problematic SRAM components than Shimano, well, all except for chains.
Edit, sorry 8 years professionally fixing & building- a touch longer DIY & riding 😉