I currently have no (working) lenses over 200mm, and I was eagerly awaiting this lens since I first saw it on the roadmap.
I was hoping it would be under $2000 like Tamron/Sigma, while fearing it would be more like the new Canon 100-400mm L II ($2200), and generally expecting (and budgeting for) it to be around $2000. But nope, it was even worse than I had feared at $2500.
$2500 is simply not feasible for me for at least the next several months, which is a damn shame because I was all ready to preorder this lens and have it ready for an air show in late March, and the lunar eclipse on April 4th.