When I made the switch from caplocks to Flintlocks after 9 years of shooting caps, I didn't trust or have confidence in the Flintlock, but it was basically because I knew nothing about them and to a begining Flintlock shooter I readily admit the darned contraption does give one pause.
I went through some of the common things we always see posted...keeping caplocks to use during bad weather...or keeping caplocks in case of a chance for a trophy hunt or something, etc...been there, did those things...and it finally it occurred to me I was trying to ride a full size bike but was keeping the training wheels on.
From that day in 2001 I committed myself 100% to use Flintlocks for everything, all year, all weather...dedicated myself to learn it and get it done, and in no time I realized the simplicity of it was just:
1) Keep your powder dry
2) Keep your flint sharp
Every time I hunt, the flint has a freshly knapped sharp edge on it and I never let my powder get damp...and mind you I use 4F and have had 100% reliability since 2001...never had a single Flintlock failure for any of the times I dropped the flint on a deer, turkey, squirrel, dove, or crow.
Somebody took issue with my comments that I'd passed the 10,000 shot mark...guess I'd mentioned that too many times or something...but the reality that comes from a lot of range shooting and a lot of game taken with them now, is the absolute confidence that Flintlocks lack for nothing...just keep the powder dry and the flint sharp...there isn't anything else.