I’ve been using nothing but 8 round mags in my 1911s for decades, yes the slightly extended mags will have a longer life span. But I have used both CMC and Kimber Tac-Mags with great success, all my full-size 1911s have Magwells so flush fit is a no go for them. I only use the flush fit 8’s in commander sized guns that I conceal carry, been using the CMC and Tac-Mags in one since the early 2000’s without issue.
As far as slightly extended 8 rounders, I’ve got a great amount of different ones that have worked extremely well for me. At least a dozen Tripp Cobra mags, my personal favorites, about 10 Wilson ETM, 9 EB that I got in the trade in deal and a couple 47d’s. I haven’t used a 7 round mag in a 1911 in well over 20 years, to be honest I really didn’t realize folks still did.
I’ve never believed in the find a mag that works with your 1911 train of thought, I’ve always believed that any quality good conditioned mag should work in a well running 1911. If your gun is mag sensitive it’s not a mag issue it’s a gun issue.