That may be true for you, and others like you, it isn't for me. When I shot more casually, I could rotate through, and it didn't seem that bad - aside from Sigs, I kept trying, but couldn't get the hang of them.
Once I started shooting open pretty frequently, it got hard to switch. Just going from my carry gun (essentially a custom version of an STI eagle), to my open gun (SVI), feels odd, and it takes a few hundred rounds before the different triggers, etc stop bothering me. Now that I've done it more, I can switch between the open gun, my main carry gun, and my beater single-stack, but it still takes a stage or two before I'm comfortable.
I gave up my much beloved P7, because I couldn't transition to it well.
I find switching grip angles quite difficult. I shot production w. a G17 before I went to open, and it took me quite awhile to get the angle of my wrist correct.