Caporegime
A friend of mine went from a 7700k setup to a 3800X setup and regrets not paying more for a 9900K. His complaints are rather trivial, but I'll note them here:
1. His 'new' PC takes three times as long to boot compared to his old Intel one
2. Fan on his motherboard is noisy
3. He transfers lots of files via SATA3 (he has a work-case for transferring lots of times to SATA SSD's). The Ryzen system is bugged and doesn't give full SATA3 speeds. I'd heard nothing of this, but apparently SATA3 on Ryzen has a known issue where it's slower than Intel's implementation.
Boot times are just as fast on the ryzen system as on the Intel, about 10 seconds, I'm using the same SSD and that is performing the same and at the speeds it's meant to.