Agree with both previous posts when they say if you're happy with what you've got, why switch? If it's just GAS, I can empathize, but try to fight it. If it aint broke don't fix it. Whatever you do, don't sell your tried-and-true gear unless you're really sure
That said, I was also a Canon shooter for YEARS, but I had a much different experience from dexter. And I think, your reaction to a Sony will depend very heavily on which body you try. Dexter, curious, which sony body did you try? From what I understand, the older A7's AF performance is miles behind the on-sensor PDAF of the Rii. I don't shoot weddings often (occasionally do), primarily I'm a portrait/headshot guy, with theatre production and promo photography as my second most frequent type of shooting. I wanted to get a higher resolution camera primarily to use in the studio, and figured that I would need to hold on to my 5D3 for the theatre work - lots of low light, fast movement sometimes, and I'd read that the Sony's AF was pretty bad in low light.
I picked up the A7Rii along with a couple native lenses and a metabones IV, and started using it side by side with my usual gear (5D3 and L's) in all scenarios, and to my pleasant surprise, it killed the 5D3 in all of them, even situations where I had assumed the 5D3 would win. No trouble at all with AF in low light theatre shoots, keeper rate shot through the roof. With the DSLR at wide apertures I would often shoot in bursts, reacquiring focus frequently, because I just knew many of them would be misses - with the Rii I'm having to retrain myself to take fewer shots, because it just doesn't miss focus... like almost never. To me that's the biggest plus. Add to that little bonuses like WYSIWYG preview in the EVF, focus peaking and magnification that makes MF'ing when needed an absolute breeze, Eye-AF for portraits with native glass, and files with so much detail and latitude that respond to extreme pushing and pulling in post. It's just a flat out win for me.
It felt like I was giving a beloved child up for adoption, but I sold the 5D3 a couple weeks ago because I had stopped bringing it to shoots. A few years back I would have laughed (hard) if someone suggested I use a Sony - and at the time my laughter might have been justified. They have really stepped up their game. This whole experience has been very eye opening.