I shoot a SL1. Im looking to jump to mirrorless, either a used a7rii, or new eos rp. I can adapt my lenses to either although the canon adapter is included with the rp, which is nice. I'll be buying new lenses as I can. I keep reading that the Canon has faster AF, that the a7i had really slow af. The a7rii seems to have still slow af, but better than the a7i, or a7ii. I don't have anything to compare this to though. Compared to something like a SL1, are all 3 going to be lighting fast? I can only compare this to computers, something I'm an expert in. Is this like someone coming from a 10 year old celeron laptop with 2mb of ram, and moving into an i5/i7 (7th gen), with 8gb of ram? Are any of these cameras going to blow me away autofocus wise? I can only assume the sl1 is slow, but i dont know if it's slow like an a7i (which i know is a way better camera), or if it's slow like it's in the stone age slow. I've googled endlessly looking for this, spent about 8 hours reading reviews. I've learned so much other stuff which has been great. But not this main question I want answered before dropping 2g. Any help is appreciated. Thank you. I'm sorry for the noobie question, I really did try to research this quite a bit.