I bought into quad lock years ago when they were mainly for cycles. Expensive but generally good quality and excellent customer service. I've done thousands of miles on many different bikes and MTB's without any problems despite owning the latest iPhone 10 XS for the last year. Though I have to say the M/C wireless charging head was a bit mickey mouse and rushed into production with flaws but I see it's been withdrawn now.
But, there are enough stories on the web to indicate there is a problem with solid mounts possibly damaging the phones image stabilisation sensors, so I bought one of the anti vibration thingy's. Initially I was a bit concerned with it seeming to wobble about too much but the screen isn't blurred and is still easy to see. I've swapped it around onto different bikes and unsurprisingly it's pretty bouncy on my Harley but soon settles down once you're moving. The jury is still out on my EMTB, I really don't think it can cope with the extremes of off road cycling but on a MC (which is what it is designed for) I think it's worth the 15 quid investment for some peace of mind. Apps like Calimoto, Waze and even Apple maps are just so good now I don't want to lose the ability to mount a phone on my bike. I now only ever use my Nav for pre planned routes.
For me, the quad lock system combined with the anti vibration damper is worth having, though I accept there is still a risk to the phone. You may feel otherwise as is your prerogative.