So just went to the camera store and bought my R5, after much consternation, along with the 1.4 TC, and the EF to RF converter. I don't think I bought the "wrong camera", just the best given my current situation. Had the R3 provided greater megapixels I would have gone with what is hoped for in a faster focus auto focus circuit....but guys like Jan Wegener have videos showing how awesome the bird eye focus tracking is in the R5...it is at 45 MP, so while I try full frame, I don't live in a bird filled world...I live in a "hey, finally I saw this one bird, and my distance isn't perfect" world...so while I HATE cropping....it's for now a tool. I gave up on my backordered EF 600mm F4 from B&H after three months and put a deposit on the RF 600mm F4 from Mike's Cameras in Sacramento...so if I can at least get it by year end I'll be happy.....I'm number one on the list. We all choose our gear based on cost, brand affiliation preferences, and personal preferences, but I'm really hopeful this camera will take me to the next level. The bird eye focus tracking, upgrading from 7 frames per second to 20 frames per second, and the upgrade from 30MP to 45MP alone seem to enhance my art. I'm so stoked....just sitting here waiting for the battery to charge....which by the way since I bought the battery grip, got screwed again by supply chain issues...a second battery is on backorder :(. All of this communities input was received very gratefully and helped me in my purchase choice, so thank you all very much.