I am don't use Hetzner, but I use ssh between Finland and Germany every day. As a matter of fact even back and forth because of tunneling. After reading the news this morning (Hetzner incident is date 3:30 UTC) I was surpised that I had not noted any lag. It remained very reponsive all day.
I have a persistent VPN tunnel between Finland and Germany and I’ve not noticed really any disruptions. If it had cut out for even a moment, it would’ve interrupted my services (since they don’t recover gracefully at the moment) and I would’ve found out.