This thread for some reason brought out the Canon trolls masquerading as either on-the-fence or gullible-impressed users ("I have Canon but Sony's really tempting me!" or "Sony was already 5 years ahead of Canon, now they're 10 years ahead!"). If you're really on-the-fence or impressed, wouldn't you be trying and buying Sony and posting on
Sony forums? Really. I did. I heard all the rave reviews since the original A7, then all the hoopla when the a7R2 came out, so decided to try it. I liked the compact size especially with a few of the zeiss lenses. But I was stunned how undeveloped it was - slow, sluggish, freezes when buffering, frustrating menus, video autofocus inferior to dpaf, etc. Very few reviews mentioned this, among many other flaws, including the pervasive dust sensor issue, oh and the anti-flicker on the a7r3 doesn't actually work (ref: TDP a7r3 review).
If you're really on-the-fence, see what 2 pro's said about the a7R2 (yes it's an older model, but compare what they experience versus the online reviews, and notice the
reality gap):
https://www.dpreview.com/forums/post/59526785 (pro users are "unknown user"/Sr1racha, the OP, who was Sung Park from
http://www.sungparkphotography.com , and Jeff2013 from
http://www.gr8photography.com ) In short, Sony's specs and real-world performance don't match. They over-hype and under-deliver. Canon does the opposite. Really, if you're impressed with Sony, go try it. The grass is always greener. Then maybe (probably) we'll eventually see you back here.