All the other defensive-marksmanship skills depend on you having your gun with you.
Older guns may offer familiarity: just make sure you can get them up and running.
A firearm is only one part of an integrated defensive plan.
Revolver ammunition capacity is not set in stone.
The rules of firearms safety are a lifestyle, and not just a thing for the shooting range.
Stance, grip and trigger control are universal concepts.
You see it on every range. But does it actually work?
A time for everything, and everything in its time.
Make your strong-hand-only shooting stronger, and your weak-hand-only shooting less weak.
The role of an armed citizen is very different from that of a competitive shooter or law enforcement officer.