It's a chain. It does chain stuff - it is reliable, sturdy and durable. These come with a master link aka quick link aka missing link. I use these chains on my Ultegra Di2 11-speed setups. Keep the chains clean and serviced, and they'll last quite a while. I can run about 4,000 miles on one until I am due for a replacement, and I remove them and clean them in an ultrasonic parts cleaner about every 1,500 miles. I clean and re-lubricate them about every 150 miles, or when I get them visibly dirty - whichever comes first.
My gravel bike came stock with a Shimano 105 rear mech, which shifted flawlessly. I was getting a lot of chain slap on bumpy gravel roads and descents. This took care of 95% of it. I will occasional see chain lube marks from the chain on the chain stay but that is only after hitting significant hard bumps.
When I was younger, I wanted the lightest titanium everything. Now, I want more teeth (on my cassettes) and longer cassette life. Campy gear lasts a long time. After 13 years, my 10 speed rear derailleur snapped in half (I think it was a chain issue), so I had to upgrade to 11 speed. I believe the 11 speed system performs better that the old 10 speed.
Getting back to cassettes, over the 13 years of my 10 speed system on two bikes, the Chorus cassettes showed less wear than the titanium. With care and cleaning, I believe the Chorus cassettes will give you many years of service.
