I suppose how many normal maps you need depends heavily on how the viewer is going to be seeing the object. 49 does sound like way too many though in pretty much any scenario. 6 sounds much more reasonable. While image 1 may not look great up close like that, if it’s a tiny detail on a larger vehicle and you’re not going to be looking at that part that close, then it’s totally acceptable. Perhaps scale your islands up or down a bit based on how visually important they are.
The bakes look good BTW, nice work how rounded those edges look.