I decided I didn't have a long enough reach for the rare times I need it, and went ahead a bought a Used Sony FE 200-600mm F5.6-6.3 G OSS for about $1,600. Did I screw up?

Picrel handheld shot of a Starling on top of a dead tree, 600mm, wide open. I tweaked the colors a bit and made it one stop brighter with camera raw in elements, but left the sharpening and noise at 0 for softness inspection for the pixel peeping.