Everyone at PF has been on that carousel.
To expand on what @
JCN said It’s the Riddle of steel:
Here’s the thing, everyone has their own definition of “proficient” But PF is primarily a shooting forum (for students and teachers of the pistol) not a gun collecting forum. You are not going to reach what most PF members would consider to be proficient by jumping around from platform to platform.
If you wanna get good you need to pick one gun or at least one platform with the same make and trigger type and then put in the work both dryfire and live fire. Especially dry fire.
Ideally you want two or three identical guns, one as a vetted defensive / duty gun, one as a training and dry fire gun and ideally one spare / dryfire gun. While the need for a spare to replace a gun that is stolen or taken into evidence after a defensive shooting is low, The need to have a spare gun when, not if, you break something is real. If you are putting an actual work on your guns, either live fire or dry fire you will eventually break something.
The upside of that is you will become more proficient than you ever could jumping around. The downside of that is monastic devotion to one gun can get a little boring.
My own solution is that I normally pick one platform for serious use and training, literally my work guns, And then everything else is a “shoot for fun” gun.
Right now My work guns are the SIG P320 /P365 series and AR/M4 carbines.
The work guns are the guns that I make sure I have a full “system quote for. Different holsters multiple magazines necessary tools spare parts, a blue gun etc.
Everything else are just cool guns that I want or fun to shoot.
In my experience, certain guns like HK LEM and stock Glocks have idiosyncrasies the demand you shoot them exclusively or nearly exclusively if you wanna shoot them at a high-level.
@
newyork has been going through this process with S&W M&Ps after a long time on the gun carousel.