I'm still on my A7R2, it still works great, and while I sometimes wistfully think about the ultrasonic wiggly massive resolution mode (700Mpix or something) on

I'm still on my A7R2, it still works great, and while I sometimes wistfully think about the ultrasonic wiggly massive resolution mode (700Mpix or something) on the A7R4, I cannot in any way justify upgrading. OTOH, I also bemoan the loss of my 70s OM1n 20 years ago.