[toni-a]

   At a time when many are going ML ..... there are some who want to know in advance whether a particular camera is going to be suitable for their needs ...... like we do here with lenses ...... the R5 costs $4,000 .... so not a financial decision to be taken lightly. 
  It's a great Swiss knife camera no doubt ..... but many want to know where it's strengths and weaknesses lie ...... with respect to their personal usage ......
.....  for BIF it has it's shortcomings ..... especially with fast flying birds, which most are ...... EVF lag ..... which ironically will make itself felt most with the new 800mm F11 telephoto ... ... where when looking through the EVF, the bird is flying into the frame ...... yet in the image the birds will be flying out of it ..... or even worse clipped .....

 .... that is worth mentioning don't you think? .... of course if you don't shoot BIF it's neither here nor there!

Battery life will also be somewhat relevant ... whether you think that Tony is a mixed bag or not!

Birds in flight is still IMHO the kingdom of DSLRs
not only there's the obvious EVF lag, but also the battery issue, when shooting birds or wildlife you need a camera that is always ready to shoot, a bird won't notify you before flying you have a very short time to frame and shoot, by the time your camera wakes the bird will be gone... so you need to keep it on all the time... also my humble experience with mirrorless tells me yjay mirrorless tracks very well but has trouble grabbing the subject vs DSLR, the time any mirrorless camera has locked on the subject a DSLR would have taken several frames, of course mirrorless os slowly closing the gap but for the time being, birds in flight is still the kingdom of DSLRs