I'll be damned. I knew something was different with my VADO. I just didn't know what.
The bike shifted smoothly, even as I was climbing. First I thought, "The bike shop finally got the shifting setup correctly." Then when I started researching 12-speed chains, I learned. It was the design.
First, I read this website, Shimano vs Sram. 12-speed chains,
https://mtbengineer.blogspot.com/2020/11/shimano-vs-sram-12-speed-chains.html
What was all the BS about Hyperglide? Then I checked out this video.
The Greatest Cycling Innovation You've Never Heard Of | Shimano Hyperglide
Finally, I checked out Shimano to explain Shimano Hyperglide+
I found the difference is a dramatic improvement. I will stay with a Shimano set.
OTHER:
Hyperglide+ technology also features. Thanks to shift ramps on the sides of the cassette sprockets, gear shifts can be under power. Teeth profiling also improves chain engagement and retention on the cassette. Shimano says Hyperglide+ technology is only compatible with Shimano chains, highlighting the need for a Shimano-branded chain.
No doubt chain and cog technology has improved over the years. Shifting under a load was a claimed feature of plain hyperglide tech. Shifts were quicker and smoother but I still found they were better with well timed easing off the pedals. SRAM quickly developed a hyperglide compatible chain that on the whole works better from me than the equivalent Shimano set. With a single chain ring and better shifting, especially electronic, dropped chains should be a thing of the past on well maintained bikes. The well maintained is the weak link. Plus now it's possible to put the chain on backwards.
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