You're overthinking the whole thing. A good diver who is fluent in diving doubles can dive an AL80 with no issue while on vacation. I routinely switch between 2 different rebreathers, diving AL 80's and diving steel 100's when out of town, and barely skip a beat.
By the time you're fluent in doubles, you'll likely also own a singles wing. My collection of wings ranges from an 18# wing for tropical diving with no wetsuit to 30# wing for NC coast diving to Zeagle BC with a 44# wing. Switching is easy.
I owned a set of steel 50's that I dove with when I got certified in 1985. I have zero desire to go back to small doubles. If I feel the urge to strap on doubles, I'd likely go with LP95's. If I want 100cf of air, I'd just dive a steel 100.
By the time you're fluent in doubles, you'll likely also own a singles wing. My collection of wings ranges from an 18# wing for tropical diving with no wetsuit to 30# wing for NC coast diving to Zeagle BC with a 44# wing. Switching is easy.
I owned a set of steel 50's that I dove with when I got certified in 1985. I have zero desire to go back to small doubles. If I feel the urge to strap on doubles, I'd likely go with LP95's. If I want 100cf of air, I'd just dive a steel 100.