I never had Claris but Sora made my left hand hurt so much on my first 300km ride that I stayed in the small ring for the second 100 miles.
!05 5800 that replaced it was much easier to use.
The first 400k my neck hurt instead.
I have di2 on my audax bike now because I was bored during lockdown. I've yet to try it on a long ride and I've not done more than 50k rides in so long now that I might not go that far again
Going faster needs hard work which makes me sweat and feel very uncomfortable.
One thing that the hair shirt brigade ignore is how good an expensive posers bike make some of us feel.