Every cloud silver linings and all that. Decision will ultimately be wether to go for the a7iv or wait for a7cii. I don’t think my hard drive will cope with 61mb images from a Riv
From the info I've seen on the A7Cii, you lose more than you gain over an A7iv - but it does depend on your priorities.
A7iv Pro's;
Shutter: A7iv has the option of full mechanical, and can do 1/8000 in full mechanical, EFCS or silent while the A7Cii is limited to 1/4000 in EFCS or 1/8000 in silent.
Flash Sync - A7iv 1/250, A7Cii 1/160
Buffer - much larger on A7iv (EG Uncompressed RAW is over 1000 on A7iv, or just 18 on the A7Cii)
Cards - A7iv Dual Slots (slot 1 CF Express A or SD), A7Cii - single SD
EVF - A7iv 3.6Mp, 0.78x, A7Cii 2.3Mp, 0.7x
Buttons - A7iv has Exposure Comp dial, AF scroll button and 2 extra custom buttons, A7Cii has an additional inset rear dial
Mount - A7iv has 6 retaining screws, A7Cii 4 retaining screws.
A7Cii Pro's
A bit Smaller, lighter, & cheaper
AF Subject Detection - Humans, Animals, Birds, A7Cii adds Insects, Cars/Trains, Aircraft
Video - A7Cii allows import of user LUT and has AI Auto framing
Touchscreen - A7Cii allows swipe ?