The only reason why I never gave the A7 any thought is the fact that it is Sony.
I don't know whether I'm just unlucky, but I find Sony products big in features, but very low in quality. I have had 3 Sony mobile phones, two died right after the warranty expired, and the third one developed an LCD problem after crossing the second year. All three of them had lackadaisical build. I've had a PS 1 and PS 2 in the 90s, and swore never again with another Sony console. Three TVs with all tubes going south after around 2 to 3 years (in contrast, I still have a running 20 year old Sharp TV, and a 15 year old Panasonic).
I almost forgot, I've had Vaio laptop that lasted only for 2 years. Now, my Apple has been with me since 2011, and my Thinkpad, since 2007.
I've tried to really like Sony, because I like how they design their products cosmetically, but I've given up.
In summary, in my experience, Sony products are great while they're still working.
So, another Sony?
No, thanks.